1966 Mercury Montclair Performance Engines

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Keep Your 1966 Mercury Montclair in Top Shape with Quality Performance Engines

Whether you’re repairing or upgrading your Performance Engine, using high-quality parts is key to keeping your 1966 Mercury Montclair looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Performance Engine Cylinder Head Gaskets, Performance Engine Timing Sets and Components, and Performance Intake Manifolds. 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 Performance Engines from Trusted Brands

Looking for a reliable Performance Engine? We’ve got you covered with options from brands you know and trust like Competition Cams and Edelbrock. For example, Competition Cams Performance Engines start at just $33.99 with an average 4.2 star rating. Edelbrock offer similar pricing and quality, backed by strong customer feedback. With over 17 reviews and a solid 4 star average, you can shop with confidence knowing other Mercury Montclair owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1966 Mercury Montclair Performance Engine at Advance Auto Parts is around $279.16, with a range that starts at $7.99 and goes up to $919.99. With 46 options in stock from 5 trusted brands, finding the right fit is easy. Popular picks like Performer 390 Intake Manifold for Ford FE, Satin Finish, Lower Intake Manifold Gasket Set: 5 Piece Set, and Thumpr 226/241 Hydraulic Flat Cam start at just $39.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Performance Engine, don’t forget to check out other key components like Performance Fuel Systems and Performance Ignition Products. At Advance Auto Parts, we’re here to help you keep your 1966 Mercury Montclair in peak condition, inside and out.

Essential 1966 Mercury Montclair Performance Engines

Competition Cams – Xtreme Energy 230/236 Hydraulic Flat Cam and Lifter Kit (Part No.CL33-248-4)

Xtreme Energy 230/236 Hydraulic Flat Cam and Lifter Kit

from

$426.99
Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts.

Product Features:
  • Excellent performance in street carbureted applications.
  • More vacuum allows an increase in duration for improved performance and assists power brakes.
  • Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.
See More

Competition Cams – High Energy 212/212 Hydraulic Flat Cam and Lifter Kit (Part No.CL33-222-3)

High Energy 212/212 Hydraulic Flat Cam and Lifter Kit

from

$404.99
Ideal for use with mainly stock components like rocker arms, intake manifolds, cylinder heads, compression ratio, torque converters and rear gear ratios, the High Energy camshaft grind family is a great choice for street performance applications.

Product Features:
  • Good blend of efficiency and performance.
  • Perfect choice for performance street rebuilds.
  • Work well with mainly stock components such as rockers, manifolds, heads, compression, torque converters and gears.
See More

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 5 Piece Set (Part No.1246)

Lower Intake Manifold Gasket Set: 5 Piece Set

from

$39.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Fel-Pro performance intake manifold gaskets have been tested with virtually all aftermarket cylinder head and intake manifold combinations.
  • Performance intake manifold gaskets designed without a metal core, to allow engine builders to trim the gasket for exact fit on modified ports.
  • Standard and Low riser
  • Printoseal elastomeric sealing beads to provide extra sealing strength around the intake port.
  • Not intended for use in emission controlled vehicles.
See More

Mr. Gasket – Intake Gasket (Part No.202A)

Intake Gasket

from

$47.49
Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. They provide excellent sealing and durability. Can be trimmed if necessary for modified port applications. Complete with manifold end seals and distributor gasket (where applicable). For original equipment replacement, high performance street, drag race and oval track.

Product Features:
  • Manufactured from cellulose/nitrile composition gasket material
  • Provides excellent sealing and durability
  • Can be trimmed if necessary for modified port applications
  • Complete with manifold end seals and distributor gasket where applicable
  • For OE replacement, high performance street, drag race and oval track use
See More

Competition Cams – Xtreme Energy 218/224 Hydraulic Flat Cam (Part No.33-238-4)

Xtreme Energy 218/224 Hydraulic Flat Cam

from

$297.99
Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts,

Product Features:
  • Excellent performance in street carbureted applications.
  • More vacuum allows an increase in duration for improved performance and assists power brakes.
  • Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.
See More

Competition Cams – Xtreme Energy 240/246 Hydraulic Flat Cam (Part No.33-250-4)

Xtreme Energy 240/246 Hydraulic Flat Cam

from

$297.99
Featuring a quicker valve opening, the Xtreme Energy camshaft profile provides increased responsiveness and more area under the lift curve than older, slower grinds. Designed to increase performance without sacrificing driveability and creature comforts,

Product Features:
  • Excellent performance in street carbureted applications.
  • More vacuum allows an increase in duration for improved performance and assists power brakes.
  • Quicker opening lobe profiles deliver increased responsiveness and more area under the lift curve.
  • Best performance with aftermarket intake manifolds, headers, lower gear ratios etc.
See More

Competition Cams – High Energy 212/212 Hydraulic Flat Cam (Part No.33-222-3)

High Energy 212/212 Hydraulic Flat Cam

from

$267.99
Ideal for use with mainly stock components like rocker arms, intake manifolds, cylinder heads, compression ratio, torque converters and rear gear ratios, the High Energy camshaft grind family is a great choice for street performance applications.

Product Features:
  • Good blend of efficiency and performance.
  • Perfect choice for performance street rebuilds.
  • Work well with mainly stock components such as rockers, manifolds, heads, compression, torque converters and gears.
See More

B & M – Torque Converter, Tork Master 2400 (Part No.50441)

Torque Converter, Tork Master 2400

from

$529.99
A higher than stock stall speed as delivered by a B&M Converter will provide several advantages. The high stall converter allows the engine to launch the car at a higher RPM where more torque is available and increased strength. Due to torque converter co

Product Features:
  • New Precision Pump Drive Tube
  • Pressure Tested
  • Fully Balanced
  • Needle Thrust Bearing
  • New Thrust Washer
See More

B & M – Holeshot 2400 (Part No.40412)

Holeshot 2400

from

$849.99
Holeshot 2400 for Ford 1966-1991 C6 with 332, 352, 360, 390, 406, 427, 428, 429 cid with 1.848 in. crank pilot (3) Application: Ford 1966 to 1991 C6 with 332, 352, 360, 390, 406, 427, 428, 429 cid with 1.848 crank pilot (3) Furnace brazed impeller New pre

Product Features:
  • Furnace Brazed Impeller
  • Steel Alloy Pump Drive Tube
  • Heavy Duty Needle Bearing
  • Between Stator and Turbine
  • Furnace Brazed Turbine
See More

B & M – Torque Converter, Holeshot 2400 (Part No.40422)

Torque Converter, Holeshot 2400

from

$637.99
A higher than stock stall speed as delivered by a B&M Converter will provide several advantages. The high stall converter allows the engine to launch the car at a higher RPM where more torque is available and increased strength. Due to torque converter co

Product Features:
  • Furnace Brazed Impeller
  • Steel Alloy Pump Drive Tube
  • Heavy Duty Needle Bearing
  • Between Stator and Turbine
  • Furnace Brazed Turbine
See More

Competition Cams – (16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides (Part No.505-16)

(16) Positive Stop PTFE Valve Seals: for 3/8" Valves and .530" Guides

from

$33.99
COMP Cams offers a complete line of valve stem seals, from the umbrella seals to the positive-stop Teflon seal. These seals are a must to keep unwanted oil from entering the combustion chamber through the clearance in the valve guides. The umbrella seal is normally used when a larger-than-stock diameter spring is used, in the case of a double spring, the positive-stop Teflon seal is used. The umbrella seals require no machining, but with the Teflon seal it is necessary to disassemble the heads and machine the top of the guide with a special .530 diameter cutter. Whenever you are planning an engine overhaul or a cam change, don’t forget the valve seals.

Product Features:
  • Work with .530″ guides and 3/8″ valve stem diameter
  • Valve stem oil seals keep unwanted oil from entering the combustion chamber
  • Several different types of valve seals are offered
See More

Edelbrock – Performer 390 Intake Manifold for Ford FE, Satin Finish (Part No.2105)

Performer 390 Intake Manifold for Ford FE, Satin Finish

from

$597.99


Product Features:
  • For Idle to 5500 RPM Street-Driven Performance
  • Dual-Plane Low-Rise Intake w/180 deg. Firing Order
  • Patented Runner Design Ensures Broad Torque Curve
  • Excellent Throttle Response and Mid-Range Power
  • 50-State Street Legal if Correct Carburetor Used
See More

Edelbrock – Performer 390 Intake Manifold for Ford FE, Polished Finish (Part No.21051)

Performer 390 Intake Manifold for Ford FE, Polished Finish

from

$919.99
Product Features:
  • For Idle to 5500 RPM Street-Driven Performance
  • Dual-Plane Low-Rise Intake w/180 deg. Firing Order
  • Patented Runner Design Ensures Broad Torque Curve
  • Excellent Throttle Response and Mid-Range Power
  • 50-State Street Legal if Correct Carburetor Used
See More

Competition Cams – 10 Degree Steel Retainer for 26120 Beehive Spring (Part No.795-1)

10 Degree Steel Retainer for 26120 Beehive Spring

from

$10.99
10 Degree Steel Retainer for 26120 Beehive Spring

Edelbrock – Water Pump Ford FE 352-428 1965-76 in Satin Finish (Part No.8805)

Water Pump Ford FE 352-428 1965-76 in Satin Finish

from

$400.99
Maximum cooling for street and racing engines. Internal passages are balanced for maximum flow. Impeller is larger than others for maximum pressure. Impeller vanes dramatically increase flow rates. Equal distribution to both sides of block. Only flows in one direction for optimum efficiency. In the early days of the automotive performance industry, you either ran what was available, or you fabricated something you thought met your needs. Such needs were the building blocks of this industry, and it was through the efforts of many that we have the automotive aftermarket, but it was through the work of one name in particular to which many in the industry owe a great debt, and that name is Edelbrock.

Product Features:
  • Maximum Cooling for Street and Racing Engines
  • Internal Passages Are Balanced for Maximum Flow
  • Impeller is Larger than Others For Max Pressure
  • Impeller Vanes Dramatically Increase Flow Rates
  • Equal Distribution to Both Sides of Block
  • Only Flows in One-Direction for Optimum Efficiency
See More

Competition Cams – High Energy Timing Set for ’64-’74 Ford 352-428 (Part No.3208)

High Energy Timing Set for '64-'74 Ford 352-428

from

$56.99
High Energy Timing Set for ’64-’74 Ford 352-428

Competition Cams – Keyway Adjustable Billet Timing Set for Ford 352-428 (Part No.7108)

Keyway Adjustable Billet Timing Set for Ford 352-428

from

$212.99
Keyway Adjustable Billet Timing Set for Ford 352-428

Mr. Gasket – Head Gasket (Part No.1132G)

Head Gasket

from

$44.49
Mr. Gasket Embossed Steel Shim Cylinder Head Gaskets are for high performance street machines, drag racing and oval track racing. This is a very unique design that has a solid metal on metal fold at the combustion seal. This fold makes for a very stout seal that is almost the equivalent of a higher-end MLS (multi-layer steel) gasket with a gas stopper layer, but at a much lower cost. This gasket also has embossments around the coolant and oil passages and has a thick aluminum flake coating. All of these features result in a steel shim head gasket that handles extreme cylinder pressures very well. It’s probably the best steel shim head gasket you could ask for. Sold individually.

Product Features:
  • Embossed steel with aluminum flake coating
  • Solid metal over metal fold at the combustion seal
  • Embossed seals at coolant and oil passages
  • Approximately .020″ compressed thickness
  • For high performance street, drag race and oval track use.
See More

Edelbrock – Cylinder Head Gasket Set for Ford (Part No.7337)

Cylinder Head Gasket Set for Ford

from

$65.99
Product Features:
  • Cylinder Head Gasket Set
  • 1958-1976 390-428
See More

FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1020)

Performance Cylinder Head Gasket

from

$39.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions!

Product Features:
  • Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines
  • Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
  • Raises combustion sealing force to roughly three times that of standard head gaskets.
  • Steel wire rings for the greatest combustion seal strength.
  • Not intended for use in emission controlled vehicles.
See More

Most Popular Performance Engine Cylinder Head Gaskets for 1966 Mercury Montclairs

Enhance your 1966 Mercury Montclair with one of the 3 Performance Engine Cylinder Head Gaskets we have in stock, starting at just $39.99.

FEL-PRO Performance – Performance Cylinder Head Gasket (Part No.1020)

Performance Cylinder Head Gasket

from

$39.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions!

Product Features:
  • Fel-Pro Performance head gaskets accommodate the high cylinder pressures and cylinder head movement associated with performance engines
  • Inserted within a stainless steel armor surrounding each cylinder, wire ring design provides highly concentrated sealing around the combustion chamber.
  • Raises combustion sealing force to roughly three times that of standard head gaskets.
  • Steel wire rings for the greatest combustion seal strength.
  • Not intended for use in emission controlled vehicles.
See More

Edelbrock – Cylinder Head Gasket Set for Ford (Part No.7337)

Cylinder Head Gasket Set for Ford

from

$65.99
Product Features:
  • Cylinder Head Gasket Set
  • 1958-1976 390-428
See More

Mr. Gasket – Head Gasket (Part No.1132G)

Head Gasket

from

$44.49
Mr. Gasket Embossed Steel Shim Cylinder Head Gaskets are for high performance street machines, drag racing and oval track racing. This is a very unique design that has a solid metal on metal fold at the combustion seal. This fold makes for a very stout seal that is almost the equivalent of a higher-end MLS (multi-layer steel) gasket with a gas stopper layer, but at a much lower cost. This gasket also has embossments around the coolant and oil passages and has a thick aluminum flake coating. All of these features result in a steel shim head gasket that handles extreme cylinder pressures very well. It’s probably the best steel shim head gasket you could ask for. Sold individually.

Product Features:
  • Embossed steel with aluminum flake coating
  • Solid metal over metal fold at the combustion seal
  • Embossed seals at coolant and oil passages
  • Approximately .020″ compressed thickness
  • For high performance street, drag race and oval track use.
See More

Best-Selling 1966 Mercury Montclair Performance Engine Timing Sets and Components

Upgrade your Montclair with one of our 3 best-selling Performance Engine Timing Sets and Components.

Competition Cams – Adjustable Double Roller Timing Set for Ford 390-428 (Part No.3108KT)

Adjustable Double Roller Timing Set for Ford 390-428

from

$362.99
Adjustable Double Roller Timing Set for Ford 390-428

Competition Cams – Keyway Adjustable Billet Timing Set for Ford 352-428 (Part No.7108)

Keyway Adjustable Billet Timing Set for Ford 352-428

from

$212.99
Keyway Adjustable Billet Timing Set for Ford 352-428

Competition Cams – High Energy Timing Set for ’64-’74 Ford 352-428 (Part No.3208)

High Energy Timing Set for '64-'74 Ford 352-428

from

$56.99
High Energy Timing Set for ’64-’74 Ford 352-428

Top-Quality Performance Intake Manifolds for 1966 Mercury Montclairs

Choose a high-quality OEM or aftermarket Performance Intake Manifold for Mercury Montclairs and enjoy top-notch performance from $597.99.

Edelbrock – Performer 390 Intake Manifold for Ford FE, Satin Finish (Part No.2105)

Performer 390 Intake Manifold for Ford FE, Satin Finish

from

$597.99


Product Features:
  • For Idle to 5500 RPM Street-Driven Performance
  • Dual-Plane Low-Rise Intake w/180 deg. Firing Order
  • Patented Runner Design Ensures Broad Torque Curve
  • Excellent Throttle Response and Mid-Range Power
  • 50-State Street Legal if Correct Carburetor Used
See More

Edelbrock – Performer 390 Intake Manifold for Ford FE, Polished Finish (Part No.21051)

Performer 390 Intake Manifold for Ford FE, Polished Finish

from

$919.99
Product Features:
  • For Idle to 5500 RPM Street-Driven Performance
  • Dual-Plane Low-Rise Intake w/180 deg. Firing Order
  • Patented Runner Design Ensures Broad Torque Curve
  • Excellent Throttle Response and Mid-Range Power
  • 50-State Street Legal if Correct Carburetor Used
See More

Top Picks for 1966 Mercury Montclair Performance Engine Intake Manifold Gaskets

Invest in one of our 2 durable Performance Engine Intake Manifold Gaskets for your 1966 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

FEL-PRO Performance – Lower Intake Manifold Gasket Set: 5 Piece Set (Part No.1246)

Lower Intake Manifold Gasket Set: 5 Piece Set

from

$39.99
Fel-Pro Performance Gaskets deliver reliable sealing under grueling racing conditions

Product Features:
  • Fel-Pro performance intake manifold gaskets have been tested with virtually all aftermarket cylinder head and intake manifold combinations.
  • Performance intake manifold gaskets designed without a metal core, to allow engine builders to trim the gasket for exact fit on modified ports.
  • Standard and Low riser
  • Printoseal elastomeric sealing beads to provide extra sealing strength around the intake port.
  • Not intended for use in emission controlled vehicles.
See More

Mr. Gasket – Intake Gasket (Part No.202A)

Intake Gasket

from

$47.49
Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. They provide excellent sealing and durability. Can be trimmed if necessary for modified port applications. Complete with manifold end seals and distributor gasket (where applicable). For original equipment replacement, high performance street, drag race and oval track.

Product Features:
  • Manufactured from cellulose/nitrile composition gasket material
  • Provides excellent sealing and durability
  • Can be trimmed if necessary for modified port applications
  • Complete with manifold end seals and distributor gasket where applicable
  • For OE replacement, high performance street, drag race and oval track use
See More

Our Performance Engine Water Pumps for 1966 Mercury Montclairs

Make a smart move for your 1966 Mercury Montclair with our Performance Engine Water Pump for $400.99.

Edelbrock – Water Pump Ford FE 352-428 1965-76 in Satin Finish (Part No.8805)

Water Pump Ford FE 352-428 1965-76 in Satin Finish

from

$400.99
Maximum cooling for street and racing engines. Internal passages are balanced for maximum flow. Impeller is larger than others for maximum pressure. Impeller vanes dramatically increase flow rates. Equal distribution to both sides of block. Only flows in one direction for optimum efficiency. In the early days of the automotive performance industry, you either ran what was available, or you fabricated something you thought met your needs. Such needs were the building blocks of this industry, and it was through the efforts of many that we have the automotive aftermarket, but it was through the work of one name in particular to which many in the industry owe a great debt, and that name is Edelbrock.

Product Features:
  • Maximum Cooling for Street and Racing Engines
  • Internal Passages Are Balanced for Maximum Flow
  • Impeller is Larger than Others For Max Pressure
  • Impeller Vanes Dramatically Increase Flow Rates
  • Equal Distribution to Both Sides of Block
  • Only Flows in One-Direction for Optimum Efficiency
See More

Top-Rated Performance Engine Brands For Your 1966 Mercury Montclair

When it comes to finding the perfect Performance Engine for your 1966 Mercury Montclair, 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 Performance Engine brands including Edelbrock and Competition Cams, and more, all known for their exceptional customer ratings (average brand rating of 4.4 stars) and competitive prices, as low as $33.99. Purchasing a Performance Engine from us here at Advance Auto Parts is a smart move for both you and your 1966 Mercury Montclair, providing peace of mind with parts that meet or exceed OEM standards.

Popular Edelbrock 1966 Mercury Montclair Performance Engines

If you’re looking for a top-quality Performance Engine for your 1966 Mercury Montclair, Advance Auto Parts has exactly what you need with our selection of Edelbrock Performance Engines. We have 1 Edelbrock Performance Engines in stock for this fitment, all known for their durability and precision fit. With prices starting at just $597.99, you’ll find the perfect Performance Engine for your needs and budget. Edelbrock Performance Engines for the 1966 Mercury Montclair come highly rated, with over 1 customer reviews and an impressive average rating of 4.4 stars. Choosing a Edelbrock Performance Engine from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
Performer 390 Intake Manifold for Ford FE, Satin Finish
from $597.99
(1)
Performer 390 Intake Manifold for Ford FE, Satin Finish
“lightweight-runs great…took 80lbs off my engine”

Top-Quality Competition Cams 1966 Mercury Montclair Performance Engines

For those in search of a high-quality Performance Engine for their 1966 Mercury Montclair, Advance Auto Parts offers a great selection of Competition Cams Performance Engines. With 2 Competition Cams Performance Engines in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Performance Engines start at just $33.99, with an average price of $230.49, giving you a range of options to suit your budget. Backed by over 3 customer ratings and an average rating of 4.2 stars, Competition Cams Performance Engines provide both reliability and excellent performance. Choosing a Competition Cams Performance Engine from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Xtreme Energy 230/236 Hydraulic Flat Cam and Lifter Kit
from $426.99
(2)
Xtreme Energy 230/236 Hydraulic Flat Cam and Lifter Kit
“Chuck, George, and Carla were amazing. Very helpful and easy to work with.”

FAQs for 1966 Mercury Montclair Performance Engines

What are the best-selling Performance Engines for 1966 Mercury Montclairs?

Out of 46 Performance Engines that fit 1966 Mercury Montclairs, the following parts are the top sellers:

What’s the price range for 1966 Mercury Montclair Performance Engines?

The prices of Performance Engines for the 1966 Mercury Montclair range from $7.99 up to $919.99 for the most premium parts.

What is the average price of a Performance Engine for a 1966 Mercury Montclair?

The average price for Performance Engines for the 1966 Mercury Montclair is $279.16. Keep in mind the variety of part types within our Performance Engine category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Performance Engines for other Mercury Montclair model years?

Yes, we carry Performance Engines for 4 model years of Mercury Montclairs between 1960 and 1968. The following model years are the most popular for Performance Engine purchases: 1968, 1967, 1965, 1964, and 1960.

What are the cheapest Performance Engines for my 1966 Mercury Montclair?

The cheapest 1966 Mercury Montclair Performance Engines we carry are:

Does Advance Auto Parts sell Performance Engines for any other 1966 Mercury models?

Yes. We stock Performance Engines for 11 other popular 1966 Mercury models. Some of the most popular are 1966 Monterey Performance Engines, 1966 Marauder Performance Engines, 1966 Colony Park Performance Engines, 1966 Villager Performance Engines, and 1966 Capri Performance Engines.

What types of Performance Engines do you sell for my 1966 Mercury Montclair?

As of 6/2/26, these are some of the most in-demand types of Performance Engines for a 1966 Mercury Montclair:

Can I get help with 1966 Mercury Montclair Performance Engine orders?

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

What is your return policy for Mercury Montclair Performance Engines?

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