Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
Availability
Engine Blocks & Parts
Showing In Stock Items. Show All 74 Items.
Dart LS Next Block Hardware Kits
Dart assembles these LS Next block hardware kits so you can easily obtain the major pieces when building your engine. These hardware kits include freeze plugs, camshaft bearings, dowels, and more. Build the engine of your dreams, from start to finish, with Dart LS Next block hardware kits.
Not Yet Reviewed
$172.99
—
$185.99
World Products Merlin IV Engine Blocks
World Products has made improvements to virtually every area of the new Merlin IV engine blocks—with the goal of producing the most technologically advanced and best-performing iron BBC block available today! New features include thicker main webs for increased strength and thicker cylinder walls which are nominally .310 in. @ 4.600 in. bore. In addition to the standard BBC 9.800 in. and 10.200 in. deck heights, new heights measuring 9.500 in., 9.850 in. and 10.250 in. are now available. The World Products Merlin IV engine blocks are also available with a 2.120 in. BBC cam journal and standard .842 in. lifter bores, or with a 2.283 in. journal for a 55mm Babbitt cam and .904 in. lifter bores. World Products has added a front oil feed for dry sump systems, and relocated the lifter oil feeds and restrictor provisions to the front of the blocks.
( 3 )
$4,645.49
—
$5,173.48
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
$64.99
Chevrolet Performance 454 C.I.D. Bare Engine Blocks
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 )
$2,672.08
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
( 1 )
$2,129.99
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
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.
( 3 )
$2,265.99
Moroso Oil Galley Barbell Plugs
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.
( 5 )
$25.99
Summit Racing™ Bellhousing Dowel Pins
Ensure proper alignment with Summit Racing™ bellhousing dowel pins. Our pins are a must for easier alignment when installing the bellhousing on your engine block. They contribute to fewer shifter problems and maximum life for your bearings and transmission. The dowel pins are available in a variety of sizes and offsets. Order the pair recommended for your vehicle application.
( 93 )
$15.99
—
$30.99
Ford Performance Parts 7.3L Godzilla Engine Blocks
What a foundation for your build! Ford Performance Parts 7.3L Godzilla engine blocks offer enormous possibilities. These are production cast iron engine blocks as used in the 2020+ F250 Super Duty 7.3L. They have 107.2mm bore. Includes the following components: * Main bearing caps/hardware * Eight piston cooling nozzles * An oil pressure sender * Four cylinder head dowels * Two transmission dowels
( 2 )
$1,503.99
Moroso Extra Long Bellhousing Dowel Pins
Moroso extra long bellhousing dowel pins provide an easy method of properly aligning the transmission input shaft to the crankshaft pilot bearing. They are extra long to simplify the task of placing the bellhousing on the engine block. Proper alignment provides a clean clutch release, maximum pilot bearing and transmission life, and reduces shifter problems.
( 74 )
$20.99
—
$29.99
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!
( 3 )
$207.91
—
$341.77
Chevrolet Performance Bellhousing Dowel Pins
Chevrolet Performance bellhousing dowel pins allow you to easily align your transmission into the block. Correct alignment provides clean clutch release, while maximizing pilot bearing and transmission life. Chevrolet Performance bellhousing dowel pins also help to reduce shifter problems.
Not Yet Reviewed
$7.99
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.
( 20 )
$119.95
—
$459.95
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
( 1 )
$5,038.95
—
$5,565.20
Summit Racing™ 5.7L Hemi Gen III Engine Blocks
A Summit Racing™ 5.7L Hemi Gen III engine block is the perfect foundation to start your project or repair your daily driver. Each engine block undergoes a rigorous testing and machining process, including: Oven cleaning; testing for cracks through magnetic particle inspection; and main line honing. They're bored and honed with a torque plate, given a hot tank wash; cam bearing journals are line bored and cam bearings are installed; and the units receive a fresh coat of paint before final packaging and shipping. Start your project or repair off right with a Summit Racing™ 5.7L Hemi Gen III engine block.
( 4 )
$1,299.99
BTR Main Cap Fasteners
Brian Tooley Racing offers main cap fasteners for a variety of Chevy small block engine applications from 1997 and up. These bolts are used to secure the main bearing caps to ensure proper operation of the crankshaft. The fasteners are stock replacement bolts for Gen III and Gen IV LS engines, available with or without a windage tray provision.
Not Yet Reviewed
$3.99
Dart Bellhousing Dowel Pins
Properly align your transmission and block with Dart bellhousing dowel pins. These premium dowel pins will help to keep the alignment correct for a clean clutch release, reduced shifter problems, and maximum pilot bearing and transmission life.
( 9 )
$2.51
—
$3.99
Dart Iron Eagle Mopar Gen III Cast Iron Bare Blocks
Designed from a clean slate approach, Dart now offers the Iron Eagle Mopar Gen III cast iron bare blocks that address the shortcomings of the Hemi Gen III platform, and are the ideal candidate for hot rodders, drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. By utilizing conventional style main caps with Gen III rotating assemblies and related components, Dart has addressed the windage and oil control problems, along with revising the cooling and oiling passages for improved flow. Non-VVT and VVT version offerings are available. Get everything you ever wanted out of your Gen III Hemi engine with the Iron Eagle Mopar Gen III cast iron bare blocks by Dart! Key features of Dart Iron Eagle Gen III Hemi cast iron engine blocks: * Manufactured from superior strength cast iron * Priority main oiling system with two lifter crossovers and restrictor provisions * Siamese cylinder bores with extra thick walls * Extra-thick decks ensure reliable head gasket seal * Blind head bolt holes available in 7/16 in. standard or 1/2 in. upgrade * Scalloped water jackets increase flow around cylinders for better cooling * Clearance for 4.050 in. stroke with steel rods * Billet steel 4-bolt main caps 1-5, center 3 main caps splayed * Main studs standard * Gen III Hemi style motor mounts * Provisions for OE stock roller lifters and cam * Uses stock timing covers * All OE bolt holes for starter, water pump, etc. * Block can be machined for VVT or non-VVT camshafts * Parts kit included (32000050 for non-VVT, or 32000051 for VVT); note parts kits do not include cam bearings
Not Yet Reviewed
$4,610.99
Callies Mopar Drag Pak Engine Blocks
A good foundation can make your build a success. Callies Mopar Drag Pak engine blocks are Gen III cast aluminum engine blocks officially licensed by Mopar and produced by Callie's sister company, Energy Manufacturing. Start your build with the right "Energy"—a Mopar Drag Pak engine block. Drag Pak block specs: * 9.25 in. deck height * 6.1 timing drive, No VCT solenoid * .937 keyway lifter bushings, require finish hone * 60mm RB cam bore, bearings not included * Delivered with 4.120 in. bores, require finish honing to 4.125 in. * 4140 q/t billet main caps * 4-bolt M1 and M5, 6-bolt M2 to M4 * 1/2 in. head studs available
Not Yet Reviewed
$10,502.00
ACDelco GM Genuine Parts Multi-Purpose Bolts
ACDelco GM Genuine Parts offers multi-purpose bolts for a variety of applications, including many Buick, Cadillac, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles. These replacement engine crankshaft main bearing cap fasteners are machined from steel and tested to rigorous standards for fitment and performance. They are the same OE bolts installed during the production of or validated by General Motors for GM vehicles. Sold individually.
Not Yet Reviewed
$29.99
Engine Works Bellhousing Dowel Pins
Engine Works bellhousing dowel pins are a must for easier alignment when installing the bellhousing on your engine block. The dowel pins contribute to fewer shifter problems and maximum life for your bearings and transmission. They are available in a variety of sizes and offsets. Order the pair of engine Works bellhousing dowel pins recommended for your vehicle's application.
Not Yet Reviewed
$9.96
Callies Mopar Hellephant Engine Blocks
A good foundation can make your build a success. Callies Mopar Hellephant engine blocks are Gen III cast aluminum engine blocks officially licensed by Mopar and produced by Callie's sister company, Energy Manufacturing. Start your build with the right "Energy"—a Mopar Hellephant engine block. Hellephant block specs: * A-355 aluminum * 9.25 in. deck height * 6.2/6.4 timing drive, VCT solenoid * Standard lifter pattern, .842 lifter bores * Standard cam bore, bearings installed * Delivered with 4.120 in. bores, require finish honing to 4.125 in. * 4140 q/t billet main caps * 4-bolt M1 and M5, 6-bolt M2 to M4 * M12 head studs available
Not Yet Reviewed
$9,364.00
S&S Cycle Super Stock Alternator-Style Crankcases
S&S Cycle Super Stock alternator-style crankcases are perfect for stock replacement and high performance applications. Available in stock and different bore sizes, some are machined for the installation of a crank position sensor, but all are compatible with stock flywheel assemblies, primary covers, gear covers, and are clearanced for 38 amp alternator stators. Certain options may include the required hardware, fittings, and bearings, and may be offered in different finishes. Select the S&S Super Stock alternator-style crankcase designed for your motorcycle's engine.
Not Yet Reviewed
$1,617.95
