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Rebuilding your GM LS engine? Replace those old main cap bolts with our Summit Racing™ LS main cap bolt kits for peace of mind. Our kit includes all 30 bolts to get the job done. They meet the same high-quality and specifications as your factory bolts.
( 15 )
$149.99
Make sure your crankshaft is secured properly using a set of these Summit Racing™ main bolt kits. They include high-tensile strength bolts that deliver maximum reliability where you need it the most. The bolt kits are designed for use with stock or aftermarket main caps, and can be installed without any modifications.
( 10 )
$209.70
ARP Pro Series main bolts are application-specific and rated at 190,000 psi. Designed for use in competition engines, as well as to meet the exacting standards and demands of professional engine builders, ARP bolts are forged from 8740 chromoly steel and feature a reduced wrenching head, large underhead radius, and rolled threads for the utmost in reliability. The threads are rolled after heat-treating which gives them about 2,000 percent better fatigue strength than most main bolts that are threaded prior to heat-treating. Hardened parallel-ground washers are included with each kit.
( 14 )
$113.99
Milodon premium-grade bolts are forged from 8740 chromoly steel. They are ground and thread-rolled after heat-treatment to ensure exacting tolerances. These bolts feature a 1/2 in. hex head for greater socket clearance, a wide flange area under the head for greater load spread, and a black oxide finish.
Not Yet Reviewed
$234.95
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.
( 390 )
$100.99
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$244.99
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®.
( 13 )
$214.99
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$218.99
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.
( 14 )
$103.99
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$235.99
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.
( 20 )
$119.95
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!
( 3 )
$207.03
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$246.49
World Products main caps are precision CNC-machined from superior-quality 1050 billet steel or ductile iron and are proudly 100 percent manufactured in the USA. The main caps are designed to provide maximum stability, strength, and balance. Front and rear caps are also available. Use these caps together for the ultimate in bottom-end stress and flex management.
Not Yet Reviewed
$112.98
On Sale
Clearance
Summit Racing™ Mockup Replica Blocks are light-weight and ship disassembled for ease of shipping and storage. The individual panels are easily assembled with tabs and slots for superior rigidity and accuracy compared to bolt-together types. Steel resists the heat from welding, so custom motor-mounts can be fabricated right on the block.
( 15 )
$399.99
$199.50
Milodon main stud kits are required where maximum gasket loading and minimal wear and tear are exerted on the block threads. These engine studs are premium-grade, race-quality studs that are created from aircraft-quality 8740 chromoly steel right in Milodon's own plant. They are ground and thread-rolled after heat treatment to ensure the exacting tolerances that Milodon requires for all of their fasteners. This ensures strength and consistent torque readings. The tensile strength of these premium fasteners is 190,000 psi, which is more than adequate for the most demanding applications. All kits come complete with 4130 heat-treated, parallel-ground washers and high-strength nuts.
( 20 )
$101.95
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$209.95
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.
( 1 )
$224.99
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.
( 6 )
$151.19
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$221.09
Get your 5.0L Coyote buttoned up with one of these Ford Performance Parts engine block hardware kits. They'll have your rotating kit bolted in with the included main cap bolts, and you'll keep the piston temperature under control with the piston cooling nozzles. The kits also include the transmission dowels, front and rear cover dowels, cylinder head dowels, and timing chain guide dowels. Plus, you get one 3/4 in. cup plug, one 13.84mm cup plug, and one 14mm cup plug.
( 1 )
$109.99
Improved Racing oil cooler adapters have a low-profile for more header clearance. The adapters are machined from a single piece of billet aluminum and black anodized. For additional clearance with reliable sealing, they come with aluminum gaskets fitted with Viton® seals, and the adapter mounting holes are counter-bored so the mounting bolts fit flush with the adapter surface. Select Improved Racing oil cooler adapters are also available with a built-in thermostat. Oil coolers help prevent the oil from getting too hot, but are also prone to lowering oil temperatures too much, especially in colder weather or during highway driving. The rebuildable thermostat speeds warm-up and helps reduce engine wear and horsepower losses by preventing oil temperatures from dropping below optimal levels. Features and benefits * 100 percent bolt-on solution; no fabrication, bending, or line modification is required * Viton® seals throughout for maximum reliability * Oil exiting the adapter is filtered oil * 6061 T-6 billet aluminum construction with black MIL-A-8625 Type II anodized finish * Standard female -8 AN O-ring boss threads for optional anodized adapter fittings in your choice of -8 AN, -10 AN, or -12AN lines * Depending on application, includes port(s) for oil sensors or turbo oil supply * Includes all necessary hardware * Limited lifetime warranty
( 10 )
$159.00
Making the weak stronger--fit your Ford 2-bolt main caps with Trick Flow® main stud race-version girdles. What makes them different from their other Ford main stud girdles? These girdles feature 1/2 in. thick tool steel construction, a black oxide finish, and studs--not bolts--for easier installation, even clamping forces, and reduced chance of main cap "walking". If you're racing, tying together your Ford factory 2-bolt main caps with main stud race girdles from Trick Flow® is a move towards strong winning performance!
( 5 )
$256.99
Billet Specialties LS valley covers are engineered to fit LS2, LS3, LS7, and LSX blocks when using a carbureted intake manifold. They feature a ribbed design and are precision-machined from 6061 T6 aluminum and polished to a mirror finish to match other ribbed accessories. The covers include high-quality ARP 12-point hardware for the perfect finishing detail. The valley covers feature a provision machined into the back for the factory breather box and two 1/8 in. NPT ports for use with external breathers, oil separators, or catch cans. Designed for use with an OEM factory gasket (not included).
Not Yet Reviewed
$218.95
Edelbrock billet main caps are precision CNC-machined steel for complete accuracy. They maximize the mating surface for maximum support. These optimized billet main caps are what your LS engine needs for added strength.
Not Yet Reviewed
$129.95
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