Subaru Legacy Spark Plugs
Your One-Stop Shop For Trusted Subaru Legacy Spark Plugs
If you’re in search of Subaru Legacy Spark Plugs aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 110 Spark Plugs from top brands with prices ranging from $2.29 to $26.49.
Beyond great prices, we stock trusted brands manufacturing all types of Spark Plugs for your Subaru Legacy. Of the 11 OEM and aftermarket parts brands we carry, some of the most popular are Autolite, NGK, and DENSO.
And don’t forget to read customer reviews across all Spark Plugs categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.
At Advance Auto Parts, we don’t think top quality Spark Plugs have to cost top dollar, and we prove it. Browse our top Subaru Legacy Spark Plugs below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.
Essential Subaru Legacy Spark Plugs
Nippon Reinz – Spark Plug Tube Seal (Part No.A8027521369NRZ)
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$4.68
Spark Plug Tube Seal
Nippon Reinz – Spark Plug tube Seal (Part No.A8027177121NRZ)
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$6.30
Nippon Reinz Spark Plug tube Seal withstands high and low temperatures to provide a reliable seal with minimal tightening. Spark Plug tube Seals are increasingly produced with profiles and not flat; that is, the gasket surface is provided with beads or lips. Now, instead of the entire gasket surface, only the profile needs to be pressed, that is, the sealing bead or sealing lip, and just a slight amount of bolting force produces sufficient deformation and adaptation.
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Product Features:
- Stays cool at temperature up to 1800F
- Designed to seal minor surface irregularities
- No re-torque required
- Teflon® coating optional
Champion – Copper Plus Spark Plug: Dependable Performance, OE Replacement, RC10YC4 (Part No.346)
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$4.49
Dependable performance. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
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Product Features:
- Copper Plus – Dependable Performance.
- Copper core center electrode allows for accurate control of heat range for longer life
- Patented TinTac and ULTRASEAL coated shell for maximum corrosion resistance
- Patented SAC-9 semiconductor resistor for maximum EMI & RFI suppression
- Built to ISO and SAE standards for proven performance
Bosch – OE Finewire Double Iridium Spark Plug (Part No.F1000404882BOS)
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$13.87
4X longer service life compared to standard copper plugs Bosch OE Finewire Iridium is engineered to deliver both High performance and long life. The Bosch Iridium Plug provides original equipment design, materials and processes represent the best of OE technology. The ultra fine wire design and laser welded tapered ground electrode deliver optimum performance, while the iridium center electrode and platinum ground electrode help it to go the distance. Center Electrode Core Material: Nickel-Yttrium and Copper and Iridium – Center Electrode Tip Material: Iridium – Ground Electrode Tip Material: Nickel-Yttrium and Iridium
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Product Features:
- OE design for optimum fit and function
- Center electrode is an ultra fine wire design.
- Provides broader heat range to resist pre-ignition and fouling
- Delivers exceptional ignitability and performance
- Tapered shape ground electrode
- Laser welded iridium-platinum alloy inlay
- Nickel-plated shell with rolled threads
- Anti-seize and corrosion protection
Autolite – Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration (Part No.AP3924)
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$4.79
Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Platinum spark plugs provide a center wire platinum firing tip which provides reduced gap erosion, fewer misfires, better performance and increased durability. Consider upgrading to Autolite Double Platinum or Iridium XP spark plugs for increased performance.
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Product Features:
- High nickel alloy side electrode maintains precise gap
- Full platinum tip assures virtually no gap erosion for long life
- Necked-down center electrode fires quicker, cleaner with less voltage for easier starts, quicker acceleration and improved fuel economy (as compared to standard plugs)
ACDelco – Double Platinum Spark Plug (Part No.41-801)
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$9.79
ACDelco Gold (Professional) Double Platinum Spark Plug are a high quality alternative to Original Equipment (OE) parts. With a copper core and double platinum pads on the center electrode, these plugs are designed to deliver long-lasting performance. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function. ACDelco Gold (Professional) parts are manufactured to meet your expectations for fit, form, and function, making them a smart choice for General Motors vehicles, as well as most makes and models, including special applications. These high-quality parts are backed by General Motors. Some ACDelco Gold parts may have formerly appeared as ACDelco Professional.
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Product Features:
- One-piece, fired-in suppressor seal blends three glass types for a gas-tight seal that helps reduce radio frequency and engine interference, regulate spark plug energy, and protect against compression pressures for long life
- Double platinum point pad on center and ground electrode offer excellent durability and consistent voltage demands to help reduce wear on ignition system
- Pure copper core results in cooler electrode temperature for maximized durability and fouling resistance
- Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
- Premium aftermarket replacement part
- Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
Champion – Champion Iridium- Boxed – REC10WYPB4 (Part No.9006)
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$7.99
Champion® Iridium – the ultimate element. This spark plug’s fine-wire iridium center and platinum ground electrodes provide the sharpest spark focus for maximum performance.
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Product Features:
- Champion Iridium – Maximum Performance. Premium Spark Plug
- Iridium center electrode delivers maximum life
- Fine-wire center electrode and V-trimmed for greater ignitability
- V-trimmed ground electrode promotes sharper spark focus
- Maintains stable operating temperature under all engine loads
- Heat-Active┐ alloy allows electrodes to reach optimal temperature quickly
Autolite – Double Platinum Spark Plug: Platinum Firing, Superior Durability, Longer Life (Part No.APP5325)
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$6.79
Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Double Platinum spark plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires and increases durability of the plug. Consider upgrading to Autolite Iridium XP spark plugs for increased performance.
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Product Features:
- Works to optimize engine performance for a longer life and improved fuel economy
- OE design
- Full-platinum tips; platinum on both the center and side electrodes to promote reduced gap wear
- Platinum ball welding process provides a consistent point of contact for enhanced adhesion
NGK – OE Series Laser Platinum Spark Plug: Fine Wire Tip Design, PFR6B-11 (Part No.4014)
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$14.49
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- Recommended for modern vehicles using distributorless ignition systems (DIS) for enhanced plug service life
DENSO – Iridium Power Spark Plug (Part No.F1000332672ND)
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$12.73
DENSO Iridium Power spark plugs represent a performance breakthrough. The laser-welded center electrode is only 0.4mm in diameter – the slimmest iridium electrode in the industry. The taper-cut side electrode complements the design, delivering reliable spark energy under the most gruelling pressures and temperatures. DENSO engineers used the power of this miraculous metal to produce an iridium center electrode that is only 0.4mm in diameter. With its superior thermal qualities, this whisker-fine electrode is capable of taking the most extreme heat and punishment. This breakthrough was matched to one of DENSO’s most famous innovations, the patented U-Groove ground electrode. The combination of these two features resulted in the Iridium Power® plug, one of the most advanced and innovative spark plugs on the market.
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Product Features:
- Tapered cut, U-Groove ground electrode
- 0.4mm iridium center electrode
- 360-degree laser welding assembly process
- Required ignition voltage reduced
- Unsurpassed center electrode durability
- Available for many performance and power sports applications, including Corvette, Viper, and Harley-Davidson The Iridium Power plug delivers greater spark energy while demanding significantly less secondary required voltage from the ignition system.
DENSO – Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, last 100K+ Miles, IK20TT (Part No.4702)
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$10.99
Durability of an OE style plug combined with Power & Torque of high performance.
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Product Features:
- 0.4mm Iridium Center Electrode: World’s Smallest Diameter that maximizes firing potential
- 0.7mm Needle Tip Ground Electrode: Promotes higher spark energy and less heat quenching
- DENSO Patented Optimized Iridium-Rhodium Alloy Formula: Highest concentration of Iridium vs. competitors for greater durability
- DENSO Patented 360 degree laser welding process: Ensuring exceptional quality bond and structural strength with the Iridium Center Electrode
- Durability of an OE style plug combined with Power & Torque of high performance.
- Withstands temperatures greater than 4000¦ Fahrenheit
- Iridium TT
DENSO – U-Groove Spark Plug: OE Performance, lasts 30K+ Miles, K20HR-U11 (Part No.3381)
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$5.49
U-Groove design provides better ignitability for increased engine efficiency.
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Product Features:
- Patented U-groove ground electrode design fires leaner mixtures than conventional plugs
- Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
- Wide range of part numbers for thousands of applications, including classic and collector cars
- Lasts twice as long as most conventional plugs
- 100% pre-fired to assure reliable operation
- U-Groove Conventional
DENSO – U-Groove Spark Plug: OE Performance, lasts 30K+ Miles, K20PR-U11 (Part No.3121)
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$4.29
U-Groove design provides better ignitability for increased engine efficiency.
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Product Features:
- Patented U-groove ground electrode design fires leaner mixtures than conventional plugs
- Precision machine-rolled threads reduce seizing and cross-threading in delicate aluminum heads
- Wide range of part numbers for thousands of applications, including classic and collector cars
- Lasts twice as long as most conventional plugs
- 100% pre-fired to assure reliable operation
- U-Groove Conventional
Dorman – Help – Spark Plug Non-Foulers – 14mm Gasket Seat Long Reach (Part No.42004)
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$9.99
This spark plug non fouler is designed for easy installation on specified vehicles to protect spark plugs from fouling and damage. It is engineered for durability and reliable performance.
Product Features:
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Product Features:
- Direct replacement – this spark plug non fouler is designed for easy installation to protect spark plugs from fouling and damage on specified vehicles
- Ideal solution – this non-fouler preserves spark plug life and is a reliable replacement for an original non-fouler that has failed due to corrosion
- Durable construction – made from quality components to ensure reliable performance and a long service life
- Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
Subaru Legacy Spark Plugs List
Spark Plugs Brands You Can Trust For Your Subaru Legacy
11 trusted brands of Spark Plugs line our shelves, ready to help keep your Subaru Legacy running smooth. Below are some of the most popular brands and their top Spark Plugs offerings:
Popular NGK Spark Plugs
NGK products for the Subaru Legacy span several categories. Some of the highest-rated NGK Spark Plugs that will fit your Subaru Legacy are:
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$19.99
(4)
OE Series Laser Iridium High Ignitability Spark Plug: PSPE Tip Design, SIFR6A11
Spark Plugs
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$22.99
(43)
OE Series Laser Iridium High Ignitability Spark Plug: PSPE Tip Design, SILZKAR7B11
Spark Plugs
Top Subaru Legacy Spark Plugs from NGK
Your Subaru Legacy will be purring again thanks to NGK brand Spark Plugs available for online order or in-store pick up. Popular NGK parts include:
Most Purchased Subaru Legacy Spark Plugs from Autolite Iridium
When you buy the most frequently purchased Autolite Iridium brand Spark Plugs, you can be confident it will be the right part for your Subaru Legacy. Here are the Autolite Iridium Spark Plugs Advanced Auto customers buy the most:
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$9.99
(166)
Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition
Spark Plugs
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$10.99
(153)
Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, last 100K+ Miles, IK20TT
Spark Plugs
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$11.99
This product is not rated
Iridium IX Spark Plug: Single Iridium Fine Wire, LKAR7BIX-11S
Spark Plugs
FAQs for Subaru Legacy Spark Plugs
What are the most purchased Spark Plugs for the Subaru Legacy?
Out of 110 Spark Plugs for the Subaru Legacy, the most popular in our inventory are:
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$9.99
(166)
Iridium XP Finewire Spark Plug: Improved Durability, More Focused Ignition
Spark Plugs
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$4.79
(131)
Platinum Spark Plug: Fires Cleaner, Easier Starts, Quicker Acceleration
Spark Plugs
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$10.99
(153)
Iridium TT Spark Plug: Ultimate Endurance and Power, 0.4mm Iridium Tip, last 100K+ Miles, IK20TT
Spark Plugs
What are the top-rated Subaru Legacy Spark Plugs?
Top-rated Spark Plugs for your Subaru Legacy based on customer reviews/ratings are:
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$6.99
(188)
DiamondFIRE Automotive Spark Plug: More Power, Saves Gas
“These plugs are amazing.”
