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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.
( 384 )
$63.99
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$286.99
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 )
$41.99
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$149.99
Dart LS Next cast iron bare blocks integrate the robust heritage of a traditional Chevy small block with the performance potential of the late model LS engine architecture. The blocks are designed to rectify some of the former LS's more noticeable shortcomings on the bottom end—while still supporting high-flow and efficient cylinder heads developed for Gen III and IV platforms. They're available in multiple engine block styles, including stock/OEM standard deck and aftermarket. Dart LS Next blocks are back and better than ever! Highlight features of the LS Next cast iron bare blocks include: * Cast with premium cast iron alloy * Conventional style 4-bolt steel main caps * Full main webbing for maximum bottom-end strength * Extended cylinder barrels at the bottom to provide greater piston support for all combinations * Extra-thick Siamese cylinder bores * Blind head bolt holes don't go through into the water jacket * Provision for oil restrictors in the lifter valley * Revised low-restriction priority main oiling system * Pro-Stock/Pro-Mod big block style stepped main oil galley * External oil filter (must be used with stock or aftermarket oil pumps) * Dual starter mounts * Expanded water jacket on #1 cylinder for additional cooling capacity * LSX-style lifter bosses and dog bone provision are provided
Not Yet Reviewed
$3,999.99
Summit Bucks
Summit Racing™ SPC Engine Blocks are aftermarket V8 Engine Blocks made for "Street, Performance, or Competition." These brand new clean sheet designed aftermarket blocks are cast in a modern state-of-the-art German foundry on brand new molds and machined in USA on modern high-speed machining centers that can hold the tightest of tolerances. Why start your engine build with a dirty, old, worn-out production block that needs hundreds or thousands of dollars of machine work--when you can start with a new heavy-duty casting full of high-performance features. We ship these blocks mostly finished but leave the cylinder bore .005" undersize, your machine shop will have to hone them for proper size. You can rest assured that you have a great foundation for your engine build. Check out the features below! Additional details: • Available Versions Include: GM Small Block, GM LS, GM Big Block (coming Soon,) Ford Windsor 5.0 and 351W • Cast in Germany at a Tier 1 OEM foundry • Made with class 35 Iron Alloy, Higher tensile strength and harder than competitors' class 30 • Machine-finished in USA on precision hi-speed machining centers- All dimensions are very accurate! • Priority main oiling systems & Siamese Cylinder bores • Blind head bolt holes • 4-bolt main caps, 180,00 PSI main bolts included
( 11 )
$2,249.99
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$3,399.99
Dart SHP Special High Performance small block Chevy cast iron bare blocks are designed for high performance and heavy duty applications. These SPH blocks are an ideal starting point for hot rodders, drag racers, circle track competitors, off-roaders and high performance marine enthusiasts. Key features of SHP small block Chevy bare blocks are: * Priority main oiling system * Siamese cylinder bores with extra-thick walls * Extra thick decks to ensure reliable head gasket seal * Blind head bolt holes (don't go through water jacket) * Scalloped water jacket walls for improved flow around cylinders for better cooling * Clearance for 3.75 in. stroke with steel rods * Splayed outer bolts on middle main bearing caps * Provisions for OE stock roller lifters and cams * All OE bolt holes starter, clutch ball, etc. * Uses 1981 to 1985 stock style oil pan and passenger side dipstick * Uses stocked stamped steel or plastic timing cover
( 20 )
$2,299.99
Direct from Chevrolet Performance are these 454 c.i.d. bare engine blocks. These are special Gen. VI bare iron blocks with 4.25 in. cylinder bores with 4-bolt main bearing caps. They have machined fuel pump pads, a one-piece rear main seal design, and standard 454 deck height. The maximum cylinder bore on these blocks is 4.25 in. plus .060 in. O.S., and will require the "Gen V/GenVI" design one-piece oil pan.
( 9 )
$2,672.07
Our Summit Racing™ brass freeze plugs were designed for marine use, but you landlocked guys will get a lot of use out of them, too. All of the necessary plugs are included.
( 100 )
$16.99
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$30.99
Dart SHP Special High Performance LS Next Pro cast iron bare blocks continue the evolution of their LS Next platform with superior strength. With full skirt designs, priority oiling systems, and other excellent features, these SHP LS Next Pro blocks are the perfect upgrades for your factory LS blocks, as well as ideal starting points for drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. Dart SHP LS Next Pro cast iron bare blocks feature: * Superior strength 220 BHN cast iron * Steel 4-bolt main caps with upgraded ARP main studs * Lifter oil crossover with restrictor provision * 6-bolt per cylinder capability * 4.000 in. up to 4.185 in. bore * Factory oil filter provision * 8-counterweight machining * Full skirt design * Priority main oiling * Siamese cylinder bores * Thick decks ensure reliable head gasket seal
( 1 )
$4,699.99
On Sale
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.
( 9 )
$288.99
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$299.99
Improved Racing's engine block oil galley barbell plugs feature a second O-ring that completely seals off the dirty oil from the clean oil, forcing 100 percent of the flow through the filter. Sharp corners were avoided and machined as smooth fillets to improve oil flow, while the bull nose tip helps smooth oil flow to the oil filter. The shaft diameter is smaller than the OEM plastic barbell to minimize flow restriction, and the threaded hole allows for easy removal with any 4mm x 0.7 threaded screw. Please refer to the Applications tab when ordering to confirm the fitment. Features of Improved Racing's barbell plugs include: * Direct replacement for plastic OEM barbell plug * Precision CNC-machined from billet 6061-T6 aluminum * Viton® rubber O-rings offer high-temperature resistance and excellent chemical compatibility with engine oils
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$26.90
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$32.90
ARP High Performance Series main bolts are rated at 180,000 psi and a popular premium replacement for OEM fasteners. Designed 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.
( 173 )
$35.99
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$77.99
Seal up the casting core holes in your engine block and heads with Melling freeze plugs. They're manufactured from a variety of quality materials—such as brass, steel, and stainless steel—and offered in different diameters and depths to fit your specific application. These expansion plugs help protect against cracks caused by the pressure of frozen coolant and in regular operation will ensure that all vital fluids stay in the engine, where they belong. They are available for a wide range of makes and models, and can be ordered individually or in a multi-piece kit.
( 161 )
$10.99
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$27.99
Use Dorman engine rear main seal covers to ensure the proper sealing of your engine, to stop and/or prevent engine oil leakage. They are made from high-quality materials and are available as direct replacements for a proper fit on various makes and models. Whatever your repair needs, Dorman has just what you're after!
( 10 )
$47.78
DOD delete blind sealing plugs are used in GM Gen IV and V V8 engine blocks that will not be using Active Fuel Management (AFM), Displacement On Demand (DOD), or the AFM/DOD lifters. To close the oil flow passages in the block and prevent a significant internal oil leak causing low oil pressure, Lingenfelter Performance Engineering DOD delete blind sealing plugs are essential. Made from high-quality M8 alloy aluminum they are built to be reliable and last.
( 17 )
$22.75
Summit Racing™ LS Rear main seal housings are the correct housings for all LS models. These aluminum housings are ideal for replacing damaged housings and building a new project from scratch. Summit Racing™ LS rear main seal housings are designed for a correct fit and quality performance.
( 17 )
$50.99
Derale LS engine oil cooler adapters are designed to give a non-thermostatic option to consumers with high performance LS engines. They feature -10 ORB inlet/outlet ports for maximum oil flow and are rated to flow up to 20 gpm. The adapters include two 1/8 in. NPT ports that can be used for additional accessories and or sensors.
( 2 )
$102.36
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$204.74
Seal up your engine while looking good with one of these ICT Billet LS lifter valley covers. They are designed to fit (Non-DoD) engines and are milled from a solid block of aerospace-quality billet aluminum. The covers offer outstanding block rigidity, while the precision-machined underside provides an excellent seal using the existing factory O-ring. Their wide chamfered edges ensure adequate intake manifold runner clearance and they include the necessary flush mount, Allen head stainless steel mounting hardware.
( 70 )
$99.99
Need to cover up your oil cooler outlet? ICT Billet offers an ideal solution with their oil cooler port delete plates. These aerospace-grade billet aluminum delete plates come complete with a reusable O-ring seal and stainless bolts.
( 40 )
$19.99
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$31.99
Allstar Performance cylinder head dowel pin kits will keep gaskets in position and properly align cylinder heads to your engine block. Dowel pins are an often overlooked item when performing a rebuild or upgrading cylinder heads. Available for different applications, don't skip the pins—let Allstar kits make your build a definite success.
( 23 )
$6.99
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$8.99
From the leader in performance cooling, Derale oil galley bypass plugs for Gen III and IV LS engines helps improve flow, oil pressure, and completely block dirty engine oil from bypassing the filter with a triple O-ring design. A direct replacement for the plastic OEM barbell plug, they are made from 6061 T-6 billet aluminum and black anodized. Derale plugs have three preinstalled Viton® O-rings and threaded #6-32 holes for easy installation.
( 4 )
$21.49
Replace a worn out or old rear oil passage plug with Moroso oil galley barbell plugs. Your vehicle's old plug could be allowing dirty engine oil to bypass the oil filter. Moroso's improved design features a secondary O-ring to seal dirty oil from flowing to the engine bearings. These dog bones also have a smaller shaft diameter than the OEM piece to minimize any flow restriction. Moroso's oil galley diverters are machined from billet aluminum, not plastic like the original OE piece, and are supplied with quality, high-temperature rated Viton® O-rings to withstand all types of engine oils and compression cycles. Whether you call them passage plugs, dog bones, or barbells, these Moroso components can be easily removed from the engine block once installed with its 4mm threaded hole.
( 4 )
$23.99
On Sale
Cover your oil cooler outlet with Summit Racing™ oil cooler block-off plates. Our covers are machined from billet aluminum and are clear anodized for added durability and looks. They are available with or without ports and include mounting hardware.
( 6 )
$24.99
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$25.99
Lakewood EZ-Adjustable bellhousing dowel pins are unique because they slip easily into the engine block and are designed to be turned with a wrench rather than a screwdriver. Once they're pointed in the correct direction, a set screw (which runs down the center) is then tightened, which prevents the dowel pin from turning. No need to pound the pins in and out—a no drilling or tapping is required! Order the model recommended for your vehicle and engine application.
( 29 )
$199.95
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.
( 13 )
$94.99
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$289.99
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