Engine Blocks & Parts | Summit Racing

Howards Cams Main Cap Support Straps

If you're running big horsepower, then you may need extra support for your front and rear main caps. Stabilize and strengthen your OEM-style main caps for big power with Howards Cams main cap support straps. These steel straps will help to counter the problems of bottom-end stress and flex management.

Not Yet Reviewed

$26.99

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$64.99

D.S.S. Main Support Systems

D.S.S. Main Support Systems beef up your block for more power! These D.S.S. Support Systems feature plates machined from 3/4 in. 6061 T6 billet aluminum that creates an additional main web structure to strengthen your block's main webbing. The forces of higher rpm and power-adders can overwhelm main bearing caps and fasteners, causing the caps to walk, fastener threads to fatigue, and your main web to crack! D.S.S. Main Support Systems dampen the harmonics that caused the main caps to move in the first place and effectively tie all five main caps together for enough brawn to produce big power--650+ hp capabilities with a stock block! Splayed 4-bolt main racing blocks are great, but so are the price tags. Race with an American-made, cost-effective solution that strengthens your block and improves your crankshaft life--D.S.S. Main Support Systems.

Not Yet Reviewed

$429.95

Ford Performance Parts 5.2L Gen 3 Coyote Aluminum Engine Blocks

Ford Performance Parts 5.2L Gen 3 Coyote aluminum engine blocks are upgraded versions of the Gen 1 and Gen 2 blocks (M-6010-M52 and M-6010-M52A). They feature higher flow oil squirters to provide added piston cooling and improved crankcase windage. All features are finish-machined, including head deck and crank bore. Get revved up for the improved high performance casting of Ford Performance 5.2L Gen 3 Coyote aluminum engine blocks and their ability to support higher horsepower engine builds! Features, items, and specs: * 94.0mm bore * Rod bolt path is clearance-machined in crankcase of block * Utilizes longer (187mm) cylinder headbolts to provide greater clamping force (requires longer headbolt kit: M-6067-M501280 or M-6067-M52B head changing kit) * Water jacket below cylinder bore updated to add more material for strength * Intake side of bore at deck surface includes cast-in brace (improves strength of cylinder wall and head gasket sealing) * Block features plasma-transferred wire arc spray weld liner coating (improved durability and heat transfer, reduced friction, and weight savings compared to previous Mustang GT aluminum blocks) * Cylinder liner coating doesn't require unique piston rings or piston material * Cylinder bores finish-honed and ready to assemble * Cross-bolted nodular iron main bearing caps—uses 12mm cylinder head bolts * Block has provisions for piston oil squirters (included) * Plugs and dowels

5.0 out of 5 stars ( 1 )

$2,494.99

Ford Performance Parts Boss 302 Engine Blocks

The perfect foundation for your Boss engine--Ford Performance Parts Boss 302 engine blocks! They're built stronger than the originals to make your high performance build a success. Designed as replacements for the legendary Boss 302 and Boss 351 blocks, they use the latest technology and manufacturing techniques. Cast from diesel-grade iron with siamesed bores, thick cylinder walls and decks, Boss block strength is far superior to any Ford production block. Boss 302 blocks are available in standard and Big Bore versions that support engine sizes up to 363 c.i.d. Proven around the world, both on the track and on the street; all Ford Performance Boss 302 blocks are cast and machined to the highest industry standards in the USA. Features include: * Big Bore version features 4.125 in. bore capacity, finished at 4.115 in. rough bore * Standard bore version is finished at 3.990 to 3.995 in. rough bore with 4.125 in. bore capacity * 8.2 in. deck height, finished at 8.200 in. plus .010 to .015 in. * Optimized cylinder wall length for stroker applications up to 3.5 in. with no grinding or clearancing (depends on crank/rod manufacturer) * Splayed 4-bolt mains on 2, 3, 4, main caps * 2-bolt main on first and fifth main caps * Main bearing bores finished to low limit * Finished lifter bores * Machined to accept factory roller lifter guides and lifter guide retainer * Fits factory 1979-95 Mustang oil pan with custom oil pickup tube, part number: M-6622-BOSS302 * NASCAR inspired front oil feed on both lifter galleys * Revised cooling system passageways * Increased bulkhead material * Threaded core and galley plugs (straight thread port plugs with O-ring) * Require special length 1/2 in. head bolts M-6065-BOSS or head studs M-6014-BOSS recommended with M-6049-X306/307/Z304DA heads * Designed for M-6049-X306//X307/C3/D3/Z304DA cylinder heads * Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads * Uses common O.D. cam bearings M-6261-J351/R351 * Unique cam plug M-6026-S351 included * M-6051-S331 or M-6051-CP331 head gasket recommended * Uses stock-type timing cover (M-6059-D351 recommended; includes fuel pump provision) * Retains clutch cross shaft pivot hole * Original-style oil filter location * Original motor mount boss locations * Original bell housing pattern * Approximate weights: Big Bore 163 lbs.; standard bore 175 lbs.

5.0 out of 5 stars ( 3 )

$2,265.99

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$2,445.99

Fleece Performance Freedom Series LSR Aluminum Engine Blocks

Fleece Performance Freedom Series LSR is a premium aluminum Gen IV LS standard deck race block designed for high performance applications. Cast from a proprietary 356 T-6 aluminum ingot, the Freedom Series LSR engine blocks are engineered with precision and designed for durability to deliver unmatched strength and compatibility with OEM LS accessories. Reinforced from top to bottom, the blocks are built for maximum performance with added features, like cross bracing in the lifter valley, maximized crankshaft saddle radius, and a 40 percent larger footprint for the main cap contact surface to the skirt wall. Whether you're upgrading for competitive racing or seeking peak performance, the Fleece Performance Freedom Series of engine blocks ensure reliability and excellence in every detail, making them a perfect choice for serious enthusiasts and professionals alike. Features: * Cross-braced lifter valley: -- Provides added structural integrity and individual drain backs for improved reliability * Heavy-duty deck thickness: -- A robust 0.750 in. deck thickness for enhanced durability * Enhanced design: -- Additional stock to the front and rear valley walls for increased strength -- A minimum 0.625 in. skirt wall thickness -- Complete reinforced exoskeleton combined with Hot Isostatic Pressing (HIP) ensures the highest quality casting available * Billet main caps: -- Billet construction ensures stability and precision fitment -- Utilizes 8740 alloy M10 main studs and side bolts along with dowels on the inner studs of the block for superior clamping and reliability -- Exclusive domed main cap design provides maximum crankshaft support * Maximized crankshaft saddle radius: -- Optimized for performance under high-stress conditions * Lightweight: -- Weighs only 120 lbs. with main caps -- Strong yet lightweight solution * Priority oil system: -- Oil rifling provides priority oil feed to critical bottom-end components -- Reduces heat, wear, and risk of failure * Ductile iron sleeves: -- Durable wear-resistant surface with improved shock absorption Engine block is shipped with: * Durabond GMP-9 cam bearings * LSR rear cover, rear cover gasket, and hardware * Plug kit * Precision ground 1018/1020 steel cam thrust plate * Transmission dowel pins * Oil galley barbell plug * Rear main seal

Not Yet Reviewed

$6,750.00

Melling Intermediate Shaft Bushings

Several Melling oil pump applications require the use of a Melling intermediate shaft bushing to provide additional support for the oil pump driveshaft while installed in the engine block. These high-quality bushing are available for specific applications. Select the one recommended for your engine.

Not Yet Reviewed

$4.99

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

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$498.00

Chevrolet Performance LSX Bowtie Engine Blocks

Chevrolet Performance LSX Bowtie engine blocks are designed for the advanced competition engine builder. They feature Siamese cylinder bores and a semi-finished deck height. The blocks can accept a maximum stroke of 4.250 in., a maximum bore of 4.250 in., and can support displacements of 454 cu. in. or more. LSX Bowties feature cast iron construction with an orange powdercoat finish. They accept all Gen III and IV LS-style cylinder heads, crankshafts, camshafts, and other components. Order the model with deck height and other options needed for your application. Additional features and specs include: * Front oil feed lines that can be plugged or restricted for mechanical flat tappet or mechanical lifter applications * Can be safely machined to 9.200 in. deck height * 1054 billet steel 6-bolt main bearing caps * 6-bolt cylinder head bolt pattern * Cam bores that can be machined to accept 60mm roller bearings * Can be machined for larger diameter lifters * External oil pump feed at the rear * Added 7th transmission bolt hole to work with early-style GM transmissions * Can accept a front motor plate for racing use * Threaded freeze plugs that can be used for external heaters or coolers * Windowed main bulkhead

5.0 out of 5 stars ( 1 )

$4,550.15

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$5,565.20

Fleece Performance Freedom Series LTR Aluminum Engine Blocks

Fleece Performance Freedom Series LTR is a premium aluminum Gen V LT standard deck race block designed for high performance applications. Cast from a proprietary 356 T-6 aluminum ingot, the Freedom Series LTR engine blocks are engineered with precision and designed for durability to deliver unmatched strength and compatibility with OEM LT accessories. Reinforced from top to bottom, the blocks are built for maximum performance with added features, like cross bracing in the lifter valley, maximized crankshaft saddle radius, and a 40 percent larger footprint for the main cap contact surface to the skirt wall. Whether you're upgrading for competitive racing or seeking peak performance, the Fleece Performance Freedom Series of engine blocks ensure reliability and excellence in every detail, making them a perfect choice for serious enthusiasts and professionals alike. Features: * Cross-braced lifter valley: -- Provides added structural integrity and individual drain backs for improved reliability * Heavy-duty deck thickness: -- A robust 0.750 in. deck thickness for enhanced durability * Enhanced design: -- Additional stock to the front and rear valley walls for increased strength -- Minimum 0.625 in. skirt wall thickness -- Complete reinforced exoskeleton combined with Hot Isostatic Pressing (HIP) ensures the highest quality casting available * Billet main caps: -- Billet construction ensures stability and precision fitment -- Utilizes 8740 alloy M10 main studs and side bolts along with dowels on the inner studs of the block for superior clamping and reliability -- Exclusive domed main cap design provides maximum crankshaft support * Maximized crankshaft saddle radius: -- Optimized for performance under high-stress conditions * Lightweight: -- Weighs only 120 lbs. with main caps -- Strong yet lightweight solution * Priority oil system: -- Oil rifling provides priority oil feed to critical bottom-end components -- Reduces heat, wear, and risk of failure * Ductile iron sleeves: -- Durable wear-resistant surface with improved shock absorption Engine block is shipped with: * Durabond GMP-9 cam bearings * LTR rear cover, rear cover gasket, and hardware * Plug kit * Precision ground 1018/1020 steel cam thrust plate * Transmission dowel pins * Oil galley barbell plug * Rear main seal

Not Yet Reviewed

$6,750.00

Dart LS Next Cast Iron Bare Blocks

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

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$4,499.99

Edelbrock Billet Main Caps

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

$130.95

Ford Performance Parts Boss 351 C.I.D. Engine Blocks

Ford Performance Parts Boss 351 c.i.d. engine blocks are based on Windsor 351 architecture with Cleveland-sized 2.749 in. main bearing journals. Available in two deck heights, 9.2 in. and 9.5 in., they feature 4-bolt main caps and screw-in freeze plugs. Technological improvements, such as splayed main bolts, siamesed bores with engineered coolant cross-drilling, front crossover lifter oiling, and diesel-grade iron with 41,000 psi tensile strength separate Ford Performance Parts Boss 351 c.i.d. engine blocks from both stock and aftermarket blocks. They can accept a maximum stroke of up to 4.250 in., depending on the crankshaft/connecting rod manufacturer, with a maximum bore size topping out at 4.185 in. (sonic check recommended). Features include: * Available in standard and Big Bore versions * Supports displacements up to 460 cubic inches * Splayed 4-bolt main on 2, 3, 4, main caps * 2-bolt mains on 1 and 5 main caps * Main bearing bores finished to low limit * Finished lifter bores * Machined to accept factory roller lifter guides and lifter guide retainer * Revised cooling system passageways * Increased bulkhead material * Threaded core and galley plugs (straight thread port plugs with O-ring) * Requires special length 1/2 in. head bolts M-6065-BOSS or head studs M-6014-BOSS recommended with M-6049-X306/307/Z304DA heads * Designed for M-6049-X306//X307/C3/D3/Z304DA cylinder heads * Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads * Use common O.D. cam bearings M-6261-J351/R351 * Unique cam plug M-6026-S351 included * Compatible with original 302 and 351W blocks * Designed to use stock type timing cover (M-6059-D351 with fuel pump provision recommended) * Fits factory Mustang oil pan with custom oil pick-up tube M-6622-BOSS302 * Retains clutch cross shaft pivot hole * Original-style oil filter location * Original motor mount boss locations * Original bell housing pattern * 9.2 in. deck height blocks weigh approximately 195 lbs. * 9.5 in. deck height blocks weigh approximately 205 lbs. * Great price and value

5.0 out of 5 stars ( 2 )

$2,644.99

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$2,744.99

Dart LS Next Aluminum Bare Blocks

Dart LS Next aluminum bare blocks are designed from a clean slate approach. They integrate the robust heritage of a traditional Chevy small block with the performance potential of the late model LS engine architecture. By utilizing conventional style main caps and oil pans with LS rotating assemblies and related components, Dart has addressed the LS engine's more noticeable shortcomings on the bottom end—while still supporting high-flow and efficient cylinder heads developed for both the Gen III and IV platforms. Dart LS Next aluminum bare blocks are a real game-changer! Highlight features of the LS Next aluminum bare blocks are: * Cast from premium aluminum alloy * One-piece rear main seal design * Conventional style 4-bolt steel main caps * Available in deck heights from 9.240 in., 9.450 in., and up to 9.800 in. * Extra-thick decks ensure reliable head gasket seal * Blind head holes available in 7/16 in. or 1/2 in. * Scalloped water jackets increase flow around cylinders for better cooling * Clearance for 4.100 in. stroke with steel rods * Must be clearanced for fully counterweighted crankshafts * Splayed outer bolts on middle main bearing caps * Provisions for OE stock roller lifters and cam * Uses stock timing covers and stock rear cover * All OE holes for starter water pump, etc. * Skirted and non-skirted design available * Driver or passenger side starter mounts (not available on skirted version)

Not Yet Reviewed

$7,249.99

Chevrolet Performance LS Bare Engine Blocks

Chevrolet Performance offers a variety of LS bare engine blocks to suit your needs. These Chevrolet Performance LS series cylinder blocks are specifically designed for late model small block engines that run the LS family of cylinder heads. These include the LS1, LS2, LS3, LS6, LS7, LQ4, LQ9, L76, and L92. Their LS block selection ranges from a stock replacement all the way up to Chevrolet Performance's LSX Bowtie block designed to support over 2,000 hp!

Not Yet Reviewed

$2,660.26

BluePrint Engines Small Block Ford Compatible 351 Cleveland Bare Engine Blocks

If you're ready to take your Ford small block to the next level, the BluePrint Engines Small Block Ford Compatible 351 Cleveland Bare Engine Blocks provide the rock-solid foundation your build deserves. Engineered to support stroker combinations up to 363 cubic inches, they deliver the strength, stability, and precision machining today's high-output Ford builds demand. Thick cylinder walls, reinforced casting, and smartly designed oiling pathways make it the ideal starting point for everything from a crisp street performer to a full-tilt track or autocross machine. Whether your vision is naturally aspirated punch or boosted aggression, the BluePrint Engines Small Block Ford Compatible 351 Cleveland Bare Engine Blocks provide a stable, reliable foundation for serious power. Key features and specifications: * High-strength cast iron (EN-GJL-250) with reinforced webbing for superior durability * The blocks feature Siamese cylinder walls that are significantly thicker than stock (nominal wall thickness of 0.250-inch) to support larger bores and high cylinder pressure * Enhanced deck and bell housing for improved head gasket sealing and additional webbing at the rear to help prevent bellhousing flange cracking * Ductile cast iron 4-bolt splayed main bearing caps for added bottom-end strength * Designed for 351 Cleveland main bearing bores and capable of supporting up to 460 cubic inch stroker assemblies * Fully machined with aligned-honed main bores, blind head bolt holes, and priority main oiling * Maximum Bore/Stroke: Supports up to 4.165-inch bore and 4.250-inch stroke * Uses a standard 2-piece rear main seal style * Designed with clearance reliefs for common aftermarket motor mounts and utilizes OEM-equivalent starters, fuel pumps, and oil pans (sold separately) * Compatible with standard 351 Windsor hydraulic roller camshafts and OEM-style retainers without needing retrofit hardware (cam/retainers not included)

Not Yet Reviewed

$3,599.00

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$4,399.99

BluePrint Engines Small Block Ford Compatible 302 Windsor Bare Engine Blocks

If you're ready to take your Ford small block to the next level, BluePrint Engines Small Block Ford Compatible 302 Windsor Bare Engine Blocks provide a rock-solid foundation your build deserves. Engineered to support stroker combinations up to 363 cubic inches, they deliver the strength, stability, and precision machining today's high-output Ford builds demand. Thick cylinder walls, reinforced casting, and smartly designed oiling pathways make them the ideal starting point for everything from a crisp street performer to a full-tilt track or autocross machine. Whether your vision is naturally aspirated punch or boosted aggression, BluePrint Engines Windsor based bare blocks give your project the durability and confidence to handle big power with classic Ford attitude. They are ideal for high-performance street, strip, or racing applications, providing a stronger foundation than original Ford cores. Key features and specifications: * Material: High-strength cast iron (EN-GJL-250) designed with thicker cylinder walls and significantly reinforced webbing compared to stock Ford blocks * Design: 4-bolt main caps (billet steel) and improved, thicker webbing, which allows for higher horsepower capacities without cracking * Dimensions: 8.200-inch deck height, 4.000-inch bore (can be bored further, with some versions supporting up to 4.125-inch or 4.165-inch max bore) * Suitability: Optimized for 302-based stroker combinations up to 363 cubic inches * Oiling System: Features priority main oiling for improved lubrication * Main Seal: 1-piece rear main seal design * Accommodates hydraulic roller cams, factory-style roller lifters, and standard timing covers (not included)

Not Yet Reviewed

$2,599.00

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$2,899.00

BluePrint Engines GM Small Block Compatible Bare Engine Blocks

If you're aiming to build a stout, reliable small block without breaking into exotic territory, the BluePrint Engines GM Small Block Compatible Bare Engine Blocks are the perfect foundation. Engineered to comfortably support combinations all the way up to 454 cubic inches, they deliver the strength, precision, and durability builder's demand. With thick cylinder walls, a rigid casting, and smart machining allowances, the BluePrint GM Small Block Compatible Bare Engine Blocks are structured to handle everything from a crisp street cruiser to a hard-hitting weekend track car. Key features and specifications: * Material Construction: EN-GJL-250 iron for increased strength * Design: Siamese bore construction with thick cylinder walls (approx. 0.230-inch at maximum bore) * Main Caps: Splayed 4-bolt main caps with 180,000-210,000 psi tensile strength * Deck Height: 9.025-inches (+0.005/-0.000) * Bore Options: Rough bores available at 3.995-inch to 3.997-inch or 4.120-inch to 4.122-inch, with a maximum finish bore of 4.250-inches * Capacity: Supports up to 454 cubic inches, with 4.125-inch bore capacity * Rear Main Seal: Offered in both 1-piece and 2-piece seal designs to accommodate different rotating assembly styles Critical features for builders: * Clearance: Cast-in clearance for up to a 3.875-inch stroke (select models clear up to 4.000-inches) * Oiling System: Uses a Priority Main Oiling system to ensure critical bearing surfaces receive oil first during high-RPM operation * Component Compatibility: Accepts standard OEM-style timing covers, oil pans, mechanical oil pumps (not included) * Machining Details: Lifter bores are machined to .8437-inches (+/- .0003-inch) and are compatible with OEM roller provisions * Additional Provisions: Blocks include a passenger-side dipstick and are drilled and tapped for mechanical fuel pumps and clutch linkages

Not Yet Reviewed

$2,299.99

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$3,999.99

Wagner Tuning Pro Series Main Stud Kits

Wagner Tuning Pro Series main stud kits are must-haves for all engines that run with increased boost pressures. They replace the original main bearing bolts with high-strength Pro Series 18.8 stud bolts with a tensile strength of 1850 N/mm², and they do not need to be replaced after disassembly, but can be reused. Pro Series bolt threads are formed and not cut as is customary in the trade. By rolling the threads, the strength of the tooth flanks can be increased by around 30 percent. All Pro-Series products are supplied with a nickel coating or a burnished finish and are therefore protected against corrosion in the long term, even under the toughest conditions. Pro Series stud bolts have a hexagon socket drive on the head side for screwing in the stud bolts. Thanks to a cone on the engine block side of the stud, these are not supported on the thread flanks when the nuts are tightened, but in the bore of the thread in the engine block. This support protects the threads during frequent assembly of racing engines. Nuts and washers are included in each set, and they also have a tensile strength of 1850 N/mm². Select the kit designed for your vehicle in the finish you prefer best.

Not Yet Reviewed

$299.00

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$749.00