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Results 1 - 24 of 2000 +

ARP Main Stud Kits

ARP main stud kits help eliminate main cap walk/fretting and protect the threads in your engine block. They include studs made from 8740 chromoly steel and heat-treated in-house to 190,000 psi tensile-strength rating. The precision J-form threads are rolled after heat-treat for much stronger threads than the competition. Kits come complete with hardened parallel-ground washers and high-quality nuts. Add confidence in the strength of your engine build with the ARP main stud kit designed for your application.

4.8 out of 5 stars ( 394 )

$252.99

$376.99

Moroso Main Cap Girdles for Ford

Moroso main cap girdles for Ford are designed to fit 289-302 c.i.d. engines using a 2-bolt main block. They are manufactured from 1/2 in. thick steel and can fit over main caps without the need for additional spacers. The girdles include all necessary mounting hardware and will fit standard high-volume oil pumps.

3.9 out of 5 stars ( 10 )

$334.99

American Racing Center Caps

American Racing center caps are the finishing touch on stylish American Racing wheels. These accessories are available in nearly a hundred styles to complement specific wheel series. They're made from quality materials, such as aluminum, stainless, steel, and plastic—with a variety of finish options, with and without logos. Maybe you've lost or damaged an original cap. Now you can replace one or all four, economically. Order the caps that correspond with your American Racing wheels and size.

4.66 out of 5 stars ( 520 )

$260.00

$338.00

On Sale

MSD Distributor Cap and Rotor Kits

The cap and rotor of any ignition system must be considered maintenance items. Just like when you change the oil and filter in your car, you should always replace your cap and rotor as a set. MSD makes it easy with these cap and rotor replacement kits. The correct rotor is already matched to the correct cap for you.

4.67 out of 5 stars ( 519 )

$306.95


$252.85

$338.95

Milodon Main Caps

Milodon aftermarket main bearing caps not only strengthen factory 2-bolt blocks, but they will also add a measurable degree of strength to 4-bolt blocks. They are made from precision-machined, high-strength steel, which has the proper balance of strength and flexibility to allow for the transfer of increased shock loads to the crank and bearings. The secret is in the side bolts. They are angled so that they pull from the side walls of the block and not from the flimsy main web area. They'll also load the cap against the register step, which will prevent dreaded "cap walk." They can be installed by anyone with a hand drill and a tap and they come with the necessary bolts, washers, and drill bushing to complete the installation. Milodon main cap kits are available in your choice of angled or straight bolts.

4.7 out of 5 stars ( 20 )

$349.95

$449.95

Johnson's Hot Rod Shop Fuel Cap Assemblies

Johnson's Hot Rod Shop fuel cap assemblies are designed to provide a retro look with the reliability of a modern part. Caps feature a vintage race car-style, double-lever, T-handle latch for a positive no-spill seal and are made from fully polished, investment-cast 304 stainless steel to look great for years to come. These caps arrive ready to install and come standard with a 4 in. diameter base and a 1.75 in. hose fitting. For vintage look parts with modern day performance, make Johnson's Hot Rod Shop your #1 source.

4.75 out of 5 stars ( 4 )

$349.00

OTC Cooling System Pressure Test Kits

OTC cooling system pressure test kits offer a universal approach to testing vehicle coolant pressure. They adapt to cooling system hoses from 1/4 in. to 5/8 in. diameter and eliminate the search for the right cap adapter. Test cooling systems faster with an OTC cooling system pressure test kit. Product features include: * Hand pump has an easy-to-read, integrated pressure gauge, padded base to set against vehicle surfaces without scratching, and a 36 in. integrated hose with a quick-coupler mated to the adapters * Hose adapters use durable brass fittings and include a banded spring clamp for easy attachment * A radiator cap adapter with quick-connect fitting is included for older vehicles * Every adapter includes a Schrader valve to prevent spray when disconnecting * Covers virtually any make and model that enters your shop * Convenient blow-molded case for storage * Covered by OTC's lifetime warranty

5.0 out of 5 stars ( 3 )

$260.99

OER Center Caps

OER center caps can replace a missing or damaged original, or freshen up the looks of all four wheels. They're offered in a variety of styles, such as flat, Rallye, hex, and closed. The caps are crafted from quality materials with several finish and logo options. Most models are designed for fitment on specific year/make applications. When you're restoring a classic vehicle, Original Equipment Reproduction is your go-to source for finishing touches.

4.53 out of 5 stars ( 59 )

$285.99

$287.92

On Sale

MSD Cap-A-Dapts

MSD Cap-A-Dapts have HEI-style posts, an adjustable rotor to allow proper phasing (Chevy and Mallory YL only), and wider post spacing to prevent crossfire and ionization. The kits include a high-quality cap with brass terminals, a rotor, and a cap spacer.

4.67 out of 5 stars ( 45 )

$327.95

RC Components Center Caps

RC Components offers a variety of center caps to finish off the look of your wheels. The billet aluminum caps are available in different sizes and finishes, either as replacements or upgrades, with or without a logo. Order the model designed to fit your powersports application.

5.0 out of 5 stars ( 1 )

$295.00

$320.00

On Sale

Street Scene Smooth Bed Rail Caps

Street Scene smooth bed rail caps are full replacements designed to cover the factory stake pocket holes for a smooth, custom look. Their precise fit makes your truck's bed lines flow from top to bottom. With their easy-to-install design, you'll spend less time putting them on, and more time enjoying your truck.

4.0 out of 5 stars ( 1 )

$299.00

$387.00


$254.15

$328.95

PRW Main Cap Stud Kits

PRW main cap stud kits help eliminate main cap walk and also protect the threads in your engine block. The main cap studs work with the main caps to help strengthen the foundation for your next high horsepower build. These main cap fasteners come complete with hardened parallel-ground washers and quality hex-style nuts. Add confidence in the strength of your engine build when you use these PRW main cap stud kits.

3.5 out of 5 stars ( 6 )

$265.34

$384.75

Gator Fasteners Main Stud Kits

Gator Fasteners main stud kits are designed for stock to performance built engines. When building a high horsepower Cummins engine, the factory main bolts can only handle so much power. Factory bolts can stretch and unfortunately cause what's called main cap walk or loss of torque. Both these conditions can contribute to major engine issues. These heavy-duty main studs eliminate these issues and add strength to the bottom end of your engine. When it comes to reliable engine assembly, don't get caught with sub-par parts. Gator studs are what you need! Each stud has rolled threads and is constructed from 8740 steel with an added proprietary element for the ultimate in durability and high-tensile strength. Order the Gator stud kit designed for your application.

3.0 out of 5 stars ( 1 )

$259.99

$414.99

On Sale

Holley Sniper HyperSpark Ready to Run Small Cap Distributors

Holley Sniper HyperSpark ready to run small cap distributors adds plug and play ignition timing control to any Holley EFI system. This line of distributors comes with a built-in ignition coil driver, removing the need of mounting an ignition box or external coil driver. The design includes a single Hall Effect sensor providing engine rpm to the ECU. The precision shutter wheel design ensures accurate timing, even at very high engine speeds. They can also be used with other EFI systems that support a Hall Effect crank signal input. Order the model designed for your application needs. Features: * Easiest plug-and-play way to add timing control to any Sniper EFI installation * Designed to work with HyperSpark ignition coil (PN: 556-152); also compatible with most canister ignition coils using the supplied ring terminals * Built-in ignition coil driver, safely provides enough spark energy for applications up to 450 hp * Patented clear installation cap eliminates any confusion while installing the distributor * Cast aluminum distributor housing looks right at home in nearly every engine bay * Comes with cast gear installed—contact camshaft manufacturer for recommended gear material * Comes with steel gear for SBF applications with an aftermarket camshaft * Precision shutter wheel provides the ECU a clean rpm signal via a single Hall Effect sensor, ensuring accurate timing even at high engine rpm * Shutter wheel design allows for a "timed sequential" fueling strategy with Terminator X, HP, and Dominator ECU's * Includes wire retainer for a clean installation

3.5 out of 5 stars ( 2 )

$511.95

$549.95


$310.11

$459.95

Jaz Products Pro Sport Fuel Cells with Plastic T-Handle Cap

Jaz Pro Sport fuel cells with plastic T-handle cap will equip your race car with quality, value, and most importantly—safety. All their Pro Sport models feature seamless, cross-linked polyethylene inner shells enclosed in strong 20-gauge welded steel containers. They're set up with one -8 AN fuel pickup fitting, and with the pickup hose routed to the right rear corner. Jaz offers you the choice of your fuel cell to come with or without safety foam, with or without tip over valve flapper under cap assembly, as well as the containers finished in black or red powdercoat for long-lasting good looks. Their lengthy list of sizes, shapes, and capacities is intended to meet your needs and wants perfectly. These Jaz Pro Sport fuel cells also feature: * D-ring bail handle cap assembly * One -8 AN tipover valve vent fitting * With or without tipover valve flapper under cap assembly

3.89 out of 5 stars ( 9 )

$284.99

$465.99

Jaz Products Pro Sport Fuel Cells with Fill Valve and Steel Cap

Jaz Pro Sport fuel cells with fill valve and steel cap will equip your race car with quality, value, and most importantly—safety. All their Pro Sport models feature seamless, cross-linked polyethylene inner shells enclosed in strong 20-gauge welded steel containers. They're set up with one -8 AN fuel pickup fitting, and with the pickup hose routed to the right rear corner. Jaz offers you the choice of your fuel cell to come with or without safety foam, as well as the containers finished in black or red powdercoat for long-lasting good looks. Their lengthy list of sizes, shapes, and capacities is intended to meet your needs and wants perfectly. Jaz Pro Sport fuel cell features: * IMCA-approved * One -8 AN tipover valve vent fitting * Spring-loaded flapper for rollover protection* Large 4 in. diameter steel cap allows quick removal and easy filling

Not Yet Reviewed

$439.99

$480.99

Dinan Mirror Caps

Dinan mirror caps provide a unique aesthetically pleasing high-tech appearance. These clearcoated carbon fiber mirror covers, unlike most, are full replacements—complete with a molded fastening system for quick installation—and not simply overlays. You'll love the touch of style these trim covers add to your vehicle. Order the mirror caps recommended to fit your application.

4.0 out of 5 stars ( 1 )

$286.95

$460.95

U.S. Mags Knock-Off Caps

U.S. Mags Knock-off caps complete the timeless look of your vehicle's wheels. The aluminum 3-bar spinners are polished to a bright finish. Take your wheels from ordinary to extraordinary with U.S. Mags Knock-off caps.

4.83 out of 5 stars ( 6 )

$290.00

Trick Flow® Main Cap Girdles for Ford

Trick Flow® main stud girdles will strengthen Ford's factory 2-bolt main cap assemblies. Crafted from tool steel and finished with black oxide, these girdles come with main cap bolts and a provision for an oil pump pickup tube hold-down. Tie your Ford caps together for better performance with main cap girdles from Trick Flow®.

3.77 out of 5 stars ( 13 )

$258.99

QMI Bed Rail Caps

These bed rail caps from QMI give your car, truck, or SUV that special look. These application-specific bed rail caps are precut with double-sided tape already attached for a quick and easy installation. No drilling or trimming is required.

4.5 out of 5 stars ( 2 )

$260.99

Howards Cams Extreme Billet Main Caps

Howards Cams extreme billet main caps are precision CNC-machined from superior-quality low-carbon 1020 billet material. They come available as stock replacements (straight bolt) or with splayed outer bolt holes. The splayed caps feature 10 degree angled outer holes to positively reinforce and tie the block together. Front, rear and center caps are all available. Use all the Howards Cams caps together for the ultimate in bottom-end stress and flex management. Howards Cams main caps feature side notches for easy removal and are proudly 100 percent manufactured in the USA. Line boring is required after installation.

4.14 out of 5 stars ( 14 )

$265.99

$285.99

Canton Racing Main Cap Girdles

Back in the day, Ford engine block castings held up fine against 220 hp--but you couldn't go racing! Canton Racing has designed these main cap girdles to reinforce the alignment of the main caps and counter the limited webbing and weaknesses of those stock blocks. These main cap supports are laser-cut from 1/2 in. to 5/8 in. steel and feature CNC-machined mounting holes and rod notches for stroke clearance. Canton Racing main cap girdles tie directly to the caps, eliminating the need for bushings, spacers, or machining of the main caps for installation. These main cap girdles are black oxide finished for corrosion resistance and all hardware is included to get you racing.

3.67 out of 5 stars ( 18 )

$369.00

$498.00

PRW Billet Steel Main Caps

PRW billet steel main caps raise the bar in the high performance industry. The main caps are precision-machined from high strength steel, which offers both the proper balance of strength and flexibility to allow transfer of increased shock loads to the crank and bearings. These main caps stabilize the entire crankshaft rotating assembly in your high-performance engine by eliminating annoying cap walk, and reducing main bearing bore distortion. With a combination of top-quality performance components and reasonable pricing, we know that when you receive your new PRW billet steel main caps, you will have no trouble seeing what the excitement is all about!

2.33 out of 5 stars ( 3 )

$292.38

$341.77

On Sale

Holley Sniper EFI HyperSpark Distributors

Do you need to upgrade your ignition system due to a recent Sniper EFI installation, but have no idea which option is best? Introducing Holley Sniper EFI HyperSpark distributors. These billet distributors use a hall-effect crank signal sensor, providing a noise-free RPM signal to the Sniper ECU. HyperSpark distributors include a patented clear installation cap that eliminates any confusion when installing the distributor. They're an easy plug-and play solution to add timing control and complete your Sniper EFI installation. Many options are available; choose the model recommended for your year/make and engine application.

4.24 out of 5 stars ( 127 )

$460.95

$511.95


$413.95

$459.95