1978 Mercury Cougar Ignition Wires

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Keep Your 1978 Mercury Cougar in Top Shape with Quality Ignition Wires

Whether you’re repairing or upgrading your Ignition Wire, using high-quality parts is key to keeping your 1978 Mercury Cougar looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Optional Spark Plug Wires, Standard Spark Plug Wires, and Ignition Wire Coil Connectors. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Ignition Wires from Trusted Brands

Looking for a reliable Ignition Wire? We’ve got you covered with options from brands you know and trust like MSD Ignition and Mallory. For example, MSD Ignition Ignition Wires start at just $121.99 with an average 4.3 star rating. Mallory offer similar pricing and quality, backed by strong customer feedback. With over 352 reviews and a solid 3.9 star average, you can shop with confidence knowing other Mercury Cougar owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 Mercury Cougar Ignition Wire at Advance Auto Parts is around $106.05, with a range that starts at $12.49 and goes up to $170.99. With 13 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like Carquest Spark Plug Wire Set: 9 Wires, Increased performance, Designed for direct fit, 35-8184, MSD Ignition Wire Set – Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229, and MSD Ignition Wire Set – Super Conductor, Multi-Angle Plug, Hei Cap, 31189 start at just $27.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Ignition Wire, don’t forget to check out other key components like Ignition Coils and Boots and Spark Plugs. At Advance Auto Parts, we’re here to help you keep your 1978 Mercury Cougar in peak condition, inside and out.

Essential 1978 Mercury Cougar Ignition Wires

MSD Ignition – MSD Ignition Wire Set – Super Conductor, Ford 302/351W, Hei, 31329 (Part No.31329)

MSD Ignition Wire Set - Super Conductor, Ford 302/351W, Hei, 31329

from

$121.99
“Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire, incredibly low resistance without electronic interference. In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) “”choke””. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps, one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps, one for the sleeve of the wire and another separate crimp to grasp the conductor.”
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Mallory – Mallory Prosidewinder 90F Univ. Wire Set, 937 (Part No.937)

Mallory Prosidewinder 90F Univ. Wire Set, 937

from

$155.99
As you’d expect from the trusted Mallory name, the 8mm red silicon jacket withstands temperatures up to 550 DegF and looks great under the hood.
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MSD Ignition – MSD Ignition Wire Set – Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229 (Part No.31229)

MSD Ignition Wire Set - Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229

from

$145.99
Our Universal spark plug wire sets come with the spark plug terminal and boot installed with the other end open. Distributor cap boots and terminals are included so you can cut the wire to the desired length, then install the terminal with the supplied Mini-Stripper-Crimper. It’s a little more work, but in the end it will be worth it.
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Accel – Accel Spark Plug Wire Set- 7mm-Super Stock-Copper Core-Universal Straight Boots-Yellow – 3008 universal fit super stock spark plug wire sets have a… (Part No.3008)

Accel Spark Plug Wire Set- 7mm-Super Stock-Copper Core-Universal Straight Boots-Yellow - 3008 universal fit super stock spark plug wire sets have a...

from

$61.59
ACCEL’s SuperStock 4000 series spark plug wire sets are designed to upgrade an OE ignition system for high-spark delivery levels for street driven applications. The 450 degree F rated silicone jacket is extruded over a tightly woven, rugged fiberglass braid. The braid is applied over high dielectric strength EPDM (Ethylene Propylene Diene Monomer) inner insulation for ignition wire performance that exceeds SAE specifications.
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Mallory – Mallory Prosidewinder 135F Univ/Wire Set, 947 (Part No.947)

Mallory Prosidewinder 135F Univ/Wire Set, 947

from

$170.99
The spiral wound alloy core provides low resistance ensuring maximum energy transfer to the spark plugs while high noise suppression keeps noise interference out of on-board electronics.
See More

MSD Ignition – MSD Ignition Wire Set – Super Conductor, Multi-Angle Plug, Hei Cap, 31189 (Part No.31189)

MSD Ignition Wire Set - Super Conductor, Multi-Angle Plug, Hei Cap, 31189

from

$145.99
Routing spark plug wires is an art form. It takes patience and time to route your wires away from the headers, through separators and to the distributor cap. Some wire sets fit perfect, but a lot of people want to build their own so they can route them exactly how they see fit.
See More

MSD Ignition – MSD Ignition Wire Set – Universal Street Fire, 8-Cylinder, Hei/90 Degree, 5552 (Part No.5552)

MSD Ignition Wire Set - Universal Street Fire, 8-Cylinder, Hei/90 Degree, 5552

from

$81.99
The Street Fire Spark Plug Wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve.
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Accel – Accel Spark Plug Wire Set- 8mm – Red Wire with Red Straight Boots – 4040R, Spark Plug Wires, Super Stock, Spiral Core, 8mm, Red, Set (Part No.4040R)

Accel Spark Plug Wire Set- 8mm - Red Wire with Red Straight Boots - 4040R, Spark Plug Wires, Super Stock, Spiral Core, 8mm, Red, Set

from

$71.99
ACCEL’s SuperStock 4000 series spark plug wire sets are designed to upgrade an OE ignition system for high-spark delivery levels for street driven applications. The 450 degree F rated silicone jacket is extruded over a tightly woven, rugged fiberglass braid. The braid is applied over high dielectric strength EPDM (Ethylene Propylene Diene Monomer) inner insulation for ignition wire performance that exceeds SAE specifications.
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Accel – Accel Spark Plug Wire Set – Super Stock – Copper Spiral Core – 8mm – Blue – This super stock spark plug wire set has a copper spiral core, 8mm diam… (Part No.4038B)

Accel Spark Plug Wire Set - Super Stock - Copper Spiral Core - 8mm - Blue - This super stock spark plug wire set has a copper spiral core, 8mm diam...

from

$79.99
These ACCEL Super Stock wire sets are a true performance upgrade replacement for OE types. Efficient delivery of spark energy for a good price. Silicone boots with zinc-plated steel terminals.
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MSD Ignition – MSD Ignition Wire Set – Black Super Conductor, Ford 302/351W, Hei, 31323 (Part No.31323)

MSD Ignition Wire Set - Black Super Conductor, Ford 302/351W, Hei, 31323

from

$165.99
“Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference. In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) “”choke””. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor.”
See More

Carquest Premium – Carquest Spark Plug Wire Set: 4 Wires, Increased performance, Designed for direct fit, 35-4021 (Part No.35-4021)

Carquest Spark Plug Wire Set: 4 Wires, Increased performance, Designed for direct fit, 35-4021

from

$17.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

MSD Ignition – MSD Ignition Wire Set – Black Super Conductor, 8-Cylinder, Multi-Angle/Hei, Universal, 31183 (Part No.31183)

MSD Ignition Wire Set - Black Super Conductor, 8-Cylinder, Multi-Angle/Hei, Universal, 31183

from

$160.99
Our Universal spark plug wire sets come with the spark plug terminal and boot installed with the other end open. Distributor cap boots and terminals are included so you can cut the wire to the desired length, then install the terminal with the supplied Mini-Stripper-Crimper. It’s a little more work, but in the end it will be worth it.
See More

Carquest Premium – Carquest Spark Plug Wire Set, 35-8165 (Part No.35-8165)

Carquest Spark Plug Wire Set, 35-8165

from

$39.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

NGK – NGK Premium OE Fit & Design Spark Plug Wire Set: Ferrite Mag Core, 8 Leads, 52113 (Part No.52113)

NGK Premium OE Fit & Design Spark Plug Wire Set: Ferrite Mag Core, 8 Leads, 52113

from

$89.99
NGK ultra-low resistance mag core wire sets provide outstanding performance and durability. High-temp premium silicone outer jacket and inner EPDM/silicone insulation contain high voltage currents for excellent dielectric strength. Stainless steel winding over premium ferrite magnetic core delivers ultra-low resistance, a more powerful spark and excellent EMI/RFI noise suppression. OE or better specified spark plug and distributor boots ensure the highest quality fit, performance and durability in every application. Spark plug boots are glued to NGK cable with a silicone sealer for a watertight seal. Stainless steel terminals utilizing up to 3 serrated crimps bite into cable jacket and inner insulation for the highest terminal retention strength (wherever possible). Locking C-shaped spring clip with corrosion-resistant plating ensures a secure and positive spark plug terminal connection.
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MSD Ignition – MSD Ignition Wire Set – Street Fire, V8 Multi-Angle, Socket/HEI, Universal, 5551 (Part No.5551)

MSD Ignition Wire Set - Street Fire, V8 Multi-Angle, Socket/HEI, Universal, 5551

from

$81.99
The Street Fire Spark Plug Wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve.
See More

Carquest Premium – Carquest Spark Plug Wire Set: 10 Wires, Increased performance, Designed for direct fit, 35-8162 (Part No.35-8162)

Carquest Spark Plug Wire Set: 10 Wires, Increased performance, Designed for direct fit, 35-8162

from

$42.49
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

Carquest Premium – Carquest Spark Plug Wire Set: 6 Wires, Increased performance, Designed for direct fit, 35-6004 (Part No.35-6004)

Carquest Spark Plug Wire Set: 6 Wires, Increased performance, Designed for direct fit, 35-6004

from

$56.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

Carquest Premium – Carquest Spark Plug Wire Set: 6 Wires, Increased performance, Designed for direct fit, 35-6195 (Part No.35-6195)

Carquest Spark Plug Wire Set: 6 Wires, Increased performance, Designed for direct fit, 35-6195

from

$63.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

Dorman – Dorman Electrical Harness – 2-Wire Ignition Coil, 85848 (Part No.85848)

Dorman Electrical Harness - 2-Wire Ignition Coil, 85848

from

$12.49
This ignition coil connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.
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Most Popular Optional Spark Plug Wires for 1978 Mercury Cougars

Enhance your 1978 Mercury Cougar with one of the 7 Optional Spark Plug Wires we have in stock, starting at just $71.99.

MSD Ignition – MSD Ignition Wire Set – Super Conductor, Multi-Angle Plug, Hei Cap, 31189 (Part No.31189)

MSD Ignition Wire Set - Super Conductor, Multi-Angle Plug, Hei Cap, 31189

from

$145.99
Routing spark plug wires is an art form. It takes patience and time to route your wires away from the headers, through separators and to the distributor cap. Some wire sets fit perfect, but a lot of people want to build their own so they can route them exactly how they see fit.
See More

Mallory – Mallory Prosidewinder 135F Univ/Wire Set, 947 (Part No.947)

Mallory Prosidewinder 135F Univ/Wire Set, 947

from

$170.99
The spiral wound alloy core provides low resistance ensuring maximum energy transfer to the spark plugs while high noise suppression keeps noise interference out of on-board electronics.
See More

MSD Ignition – MSD Ignition Wire Set – Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229 (Part No.31229)

MSD Ignition Wire Set - Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229

from

$145.99
Our Universal spark plug wire sets come with the spark plug terminal and boot installed with the other end open. Distributor cap boots and terminals are included so you can cut the wire to the desired length, then install the terminal with the supplied Mini-Stripper-Crimper. It’s a little more work, but in the end it will be worth it.
See More

MSD Ignition – MSD Ignition Wire Set – Super Conductor, Ford 302/351W, Hei, 31329 (Part No.31329)

MSD Ignition Wire Set - Super Conductor, Ford 302/351W, Hei, 31329

from

$121.99
“Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire, incredibly low resistance without electronic interference. In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) “”choke””. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps, one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps, one for the sleeve of the wire and another separate crimp to grasp the conductor.”
See More

MSD Ignition – MSD Ignition Wire Set – Universal Street Fire, 8-Cylinder, Hei/90 Degree, 5552 (Part No.5552)

MSD Ignition Wire Set - Universal Street Fire, 8-Cylinder, Hei/90 Degree, 5552

from

$81.99
The Street Fire Spark Plug Wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve.
See More

Mallory – Mallory Prosidewinder 90F Univ. Wire Set, 937 (Part No.937)

Mallory Prosidewinder 90F Univ. Wire Set, 937

from

$155.99
As you’d expect from the trusted Mallory name, the 8mm red silicon jacket withstands temperatures up to 550 DegF and looks great under the hood.
See More

Accel – Accel Spark Plug Wire Set- 8mm – Red Wire with Red Straight Boots – 4040R, Spark Plug Wires, Super Stock, Spiral Core, 8mm, Red, Set (Part No.4040R)

Accel Spark Plug Wire Set- 8mm - Red Wire with Red Straight Boots - 4040R, Spark Plug Wires, Super Stock, Spiral Core, 8mm, Red, Set

from

$71.99
ACCEL’s SuperStock 4000 series spark plug wire sets are designed to upgrade an OE ignition system for high-spark delivery levels for street driven applications. The 450 degree F rated silicone jacket is extruded over a tightly woven, rugged fiberglass braid. The braid is applied over high dielectric strength EPDM (Ethylene Propylene Diene Monomer) inner insulation for ignition wire performance that exceeds SAE specifications.
See More

Best-Selling 1978 Mercury Cougar Standard Spark Plug Wires

Upgrade your Cougar with one of our 5 best-selling Standard Spark Plug Wires, earning an average 3.17 stars rating across 79 reviews.

MSD Ignition – MSD Ignition Wire Set – Black Super Conductor, Ford 302/351W, Hei, 31323 (Part No.31323)

MSD Ignition Wire Set - Black Super Conductor, Ford 302/351W, Hei, 31323

from

$165.99
“Engineered from the inside out, the 8.5 offers everything you have ever wanted in a wire; incredibly low resistance without electronic interference. In a single 12 inch length of Super Conductor Wire there is only 40 – 50 ohms of resistance. That is the lowest resistance of any helically wound wire. To accomplish this, we use a copper alloy conductor due to it’s great voltage carrying capabilities. The low resistance results in less loss in spark energy so more reaches the spark plug. The conductor is wound extremely tight around a special center core. So tight in fact, that there is over 40 feet of conductor wrapped into a single foot of plug wire. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference (EMI) “”choke””. This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle. The outer sleeve that surrounds the conductor assembly is just as impressive. A proprietary blend of silicone and synthetic material produce a sleeve that is highly resistant to high heat as well as abrasion and tears. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor. The MSD’s 8.5mm spark plug terminals feature Dual Crimp terminals. As the name implies, the terminals feature two crimps; one for the sleeve of the wire and another separate crimp to grasp the conductor.”
See More

MSD Ignition – MSD Ignition Wire Set – Street Fire, V8 Multi-Angle, Socket/HEI, Universal, 5551 (Part No.5551)

MSD Ignition Wire Set - Street Fire, V8 Multi-Angle, Socket/HEI, Universal, 5551

from

$81.99
The Street Fire Spark Plug Wires feature a low resistance conductor that’s wrapped in a sleek and durable black sleeve.
See More

Carquest Premium – Carquest Spark Plug Wire Set: 9 Wires, Increased performance, Designed for direct fit, 35-8184 (Part No.35-8184)

Carquest Spark Plug Wire Set: 9 Wires, Increased performance, Designed for direct fit, 35-8184

from

$27.99
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

Carquest Premium – Carquest Spark Plug Wire Set: 10 Wires, Increased performance, Designed for direct fit, 35-8162 (Part No.35-8162)

Carquest Spark Plug Wire Set: 10 Wires, Increased performance, Designed for direct fit, 35-8162

from

$42.49
CARQUEST Premium Spark Plug Wire Sets are engineered to restore ignition wire reliability and performance. They are designed to meet or exceed OE design requirements, performance, fit, form and function of the OE wire. Stainless steel magnetic winding delivers maximum voltage to the spark plug for more powerful, and longer spark resulting in optimum engine performance while reducing the chance for misfire, and eliminating radio static.
See More

MSD Ignition – MSD Ignition Wire Set – Black Super Conductor, 8-Cylinder, Multi-Angle/Hei, Universal, 31183 (Part No.31183)

MSD Ignition Wire Set - Black Super Conductor, 8-Cylinder, Multi-Angle/Hei, Universal, 31183

from

$160.99
Our Universal spark plug wire sets come with the spark plug terminal and boot installed with the other end open. Distributor cap boots and terminals are included so you can cut the wire to the desired length, then install the terminal with the supplied Mini-Stripper-Crimper. It’s a little more work, but in the end it will be worth it.
See More

Top-Quality Ignition Wire Coil Connectors for 1978 Mercury Cougars

Choose a high-quality OEM or aftermarket Ignition Wire Coil Connector for Mercury Cougars and enjoy top-notch performance from $12.49.

Dorman – Dorman Electrical Harness – 2-Wire Ignition Coil, 85848 (Part No.85848)

Dorman Electrical Harness - 2-Wire Ignition Coil, 85848

from

$12.49
This ignition coil connector is designed to match the appearance and function of the original hardware on specified applications. Made of quality materials, it is engineered for reliable performance and durability.
See More

Top-Rated Ignition Wire Brands For Your 1978 Mercury Cougar

When it comes to finding the perfect Ignition Wire for your 1978 Mercury Cougar, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 5 trusted brands. We carry the most popular Ignition Wire brands including Mallory and MSD Ignition, and more, all known for their exceptional customer ratings (average brand rating of 4.9 stars) and competitive prices, as low as $121.99. Purchasing a Ignition Wire from us here at Advance Auto Parts is a smart move for both you and your 1978 Mercury Cougar, providing peace of mind with parts that meet or exceed OEM standards.

Popular Mallory 1978 Mercury Cougar Ignition Wires

If you’re looking for a top-quality Ignition Wire for your 1978 Mercury Cougar, Advance Auto Parts has exactly what you need with our selection of Mallory Ignition Wires. We have 2 Mallory Ignition Wires in stock for this fitment, all known for their durability and precision fit. With prices starting at just $155.99 and an average cost of $163.49, you’ll find the perfect Ignition Wire for your needs and budget. Mallory Ignition Wires for the 1978 Mercury Cougar come highly rated, with over 3 customer reviews and an impressive average rating of 4.9 stars. Choosing a Mallory Ignition Wire from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Mallory Prosidewinder 90F Univ. Wire Set, 937
from $155.99
(1)
Mallory Prosidewinder 90F Univ. Wire Set, 937
“Good quality wires with low impedence. The Advance listing says to get part 669 if you have male terminal distributor cap. This is not needed – the ”
Mallory Prosidewinder 135F Univ/Wire Set, 947
from $170.99
(2)
Mallory Prosidewinder 135F Univ/Wire Set, 947
“Very high quality product for my show car. My car is a 1940 Ford Tudor Deluxe with a 1942 style ‘crab’ distributor. It still has the original engine t”

Top-Quality MSD Ignition 1978 Mercury Cougar Ignition Wires

For those in search of a high-quality Ignition Wire for their 1978 Mercury Cougar, Advance Auto Parts offers a great selection of MSD Ignition Ignition Wires. With 3 MSD Ignition Ignition Wires in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Ignition Wires start at just $121.99, with an average price of $137.99, giving you a range of options to suit your budget. Backed by over 8 customer ratings and an average rating of 4.3 stars, MSD Ignition Ignition Wires provide both reliability and excellent performance. Choosing a MSD Ignition Ignition Wire from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
MSD Ignition Wire Set - Super Conductor, Ford 302/351W, Hei, 31329
from $121.99
(3)
MSD Ignition Wire Set – Super Conductor, Ford 302/351W, Hei, 31329
“great product extra length in the wires makes sure that you have plenty of play in them to get them routed away from hot exhaust manifolds”
MSD Ignition Wire Set - Super Conductor, Multi-Angle Plug, Hei Cap, 31189
from $145.99
(1)
MSD Ignition Wire Set – Super Conductor, Multi-Angle Plug, Hei Cap, 31189
“Excellent product,but set aside time to do the job correctly and neatly.”
MSD Ignition Wire Set - Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229
from $145.99
(4)
MSD Ignition Wire Set – Super Conductor, 8-Cylinder, 90 Degree Plug/90 Degree Plug, 31229
“Replaced the wires in my 90′ Suburban… Major upgrade from the AC Delco wires that were in the truck! I’m no mechanic, but I had little to no issues ”

FAQs for 1978 Mercury Cougar Ignition Wires

What are the best-selling Ignition Wires for 1978 Mercury Cougars?

What’s the price range for 1978 Mercury Cougar Ignition Wires?

The prices of Ignition Wires for the 1978 Mercury Cougar range from $12.49 up to $170.99 for the most premium parts.

What is the average price of an Ignition Wire for a 1978 Mercury Cougar?

The average price for Ignition Wires for the 1978 Mercury Cougar is $106.05. Keep in mind the variety of part types within our Ignition Wire category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Ignition Wires for other Mercury Cougar model years?

Yes, we carry Ignition Wires for 31 model years of Mercury Cougars between 1967 and 2002. The following model years are the most popular for Ignition Wire purchases: 2002, 2001, 2000, 1999, 1995, 1994, 1993, 1992, and 1991.

Does Advance Auto Parts sell Ignition Wires for any other 1978 Mercury models?

Yes. We stock Ignition Wires for 4 other popular 1978 Mercury models. Some of the most popular are 1978 Grand Marquis Ignition Wires, 1978 Zephyr Ignition Wires, 1978 Marquis Ignition Wires, 1978 Monarch Ignition Wires, and 1978 Bobcat Ignition Wires.

What are the top-rated Ignition Wires that fit the 1978 Mercury Cougar?

Based on 352 reviews by customers, our 1978 Mercury Cougar Ignition Wires have an average customer rating of 3.9 stars. These are the highest-rated categories of Ignition Wires for the 1978 Mercury Cougar and their top-rated products:

What types of Ignition Wires do you sell for my 1978 Mercury Cougar?

As of 8/2/26, these are some of the most in-demand types of Ignition Wires for a 1978 Mercury Cougar:

Can I get help with 1978 Mercury Cougar Ignition Wire orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Ignition Wires and more.

What is your return policy for Mercury Cougar Ignition Wires?

Advance Auto Parts keeps returns simple. For new Mercury Cougar Ignition Wires and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.