Availability
S&S Cycle offers MK-Series Performance crankcases for a variety of Harley-Davidson Touring and Softail street bikes from 2017 and up. These assembly replacements enable you to build massive power easily and reliably, particularly with M8 engines, and stock cases can't provide the necessary quality base. MK-Series crankcases are designed to allow for larger bores, scrape more oil than stock, have a larger volume sump, and fit in a stock frame without modification. Order the model recommended for your application.
Not Yet Reviewed
$2,499.95
—
$2,849.95
The Twin Cam 88A crankcases from S&S Cycle provide a stronger, more reliable, and more durable foundation for the engine, particularly in high-performance applications, addressing weaknesses in the previous Evolution engine. The Twin Cam 88A is intended to replace crankcases in HD® Twin Cam 88 engines in existing HD® chassis only. S&S stock style crankcases have a rear motor mount that bolts directly to the stock 1999-2006 transmission for all models except 2006 HD® Dyna. Known for their strength and durability, these crankcases are compatible with the stock primary, charging system, and other stock components. Stock bore cases are perfect for replacement applications, 4 in. bore cases are a natural for use with the S&S Super Sidewinder Hot Set Up kits, and 4 1/8 in. bore cases make really large displacement custom engines possible and are available with the S&S cylinder stud pattern or with the stock cylinder stud pattern. The 4 1/8 in. bore cases with stock stud pattern are ideal for the S&S 124 in. Hot Set Up Kit for stock crankcases. Select the Twin Cam 88A crankcase designed specifically for your HD® bike model.
Not Yet Reviewed
$2,152.95
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.
( 16 )
$199.50
—
$299.99
Keep your main caps secure with a set of Chevrolet Performance main cap fasteners. They are made from quality OEM materials and are built to strict tolerances to ensure a direct fit. You don't ever want to have a failure in your engine's rotating assembly. Pick up Chevrolet Performance main cap fasteners for maximum reliability.
( 6 )
$5.99
—
$9.99
These COMP Cams engine finishing kits contain the often-forgotten components missing during final engine assembly. They include parts like Woodruff keys, cylinder head alignment dowels, cam bolts, timing cover dowels, and oil pump dowels. Available for small and big block Chevrolet and small block Ford engines, the COMP Cams engine finishing kits make engine assembly easy.
( 66 )
$18.95
—
$54.95
ATK High Performance Engines offers GM 350 Vortec bare blocks with the following specifications: * Block: 100 percent new bare block with one-piece rear main seal * Bore: 4.000 in. (4.0003-4.0008 in. -- Pistons size vary, final honing may be required) * Maximum bore: 4.060 in. recommended * Displacement: 350 cu. in. * Main journal type: Chevy 350 * Engine block material: Premium iron alloy * Engine block style: Aftermarket, based off the Vortec 350 roller block * Engine block deck height: Standard deck * Engine oiling system: Priority main * Fuel pump boss: Yes * Main bolt style: 4-bolt * Main caps included: Yes * Main cap material: Cast iron * Main cap fasteners included: Yes * Main bearings included: No * Camshaft bearings: Dura-Bond, installed and clocked to OEM position * Freeze plugs: Brass, installed and sealed * Oil galley plugs: Installed and sealed * Roller camshaft compatible: Yes * Stroker clearanced: Yes, but the assembler must always check, as components differ
Not Yet Reviewed
$1,898.99
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
—
$258.99
Milodon freeze plugs will not rot out, like lower cost steel ones. Your new engine assembly deserves the best. Don't get stuck trying to replace a leaking steel freeze plug behind a motor mount a year or two from now. Milodon freeze plug kits include all of the necessary external block freeze plugs, and cam and oil galley plugs for one complete engine.
( 48 )
$19.95
—
$55.95
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
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
—
$341.77
Why use ARP main cap studs for your motorcycle or UTV? They're machined from 8740 chromoly steel, heat-treated to 190,000 psi tensile strength, and precision J-form thread-rolled to create fasteners with the strongest threads available. The studs eliminate main cap walk and fretting—and offer the ability to obtain more accurate torque readings, easier engine assembly, and the proper alignment of caps. Order the set recommended for your powersports machine!
Not Yet Reviewed
$116.99
—
$183.99
ARP Powersports engine and accessory bolt kits contain professional-quality fasteners. They're manufactured with premium materials and finishes that are nominally rated at 180,000 psi tensile strength—superior to OEM bolts and better than hardware grades. Motorcycles run at very high rpms and put tremendous stress on lightweight parts. The task is holding your engine and accessories together during those times. ARP Powersports fasteners are a convenient and easy way to assemble your engine with confidence, knowing that ARP is up to the challenge. Choose the kit designed for your specific bike.
( 1 )
$91.99
World Products PBM Performance block kits are a great way to begin your next engine build. These kits contain accessory parts like freeze plugs, cam plugs, oil galley plugs, cylinder head dowels, timing cover dowels, and bellhousing dowels. With all the little parts assembled for you, it's time to get started! Kits are available for small block Ford or big block Chevy engine applications.
( 4 )
$30.67
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
Save time and money with Engine Works engine finishing kits. During an engine tear down and the cleaning process can lead to broken, bent, distorted, or lost service parts. These items can be troubling to any engine re-builder, especially when they are difficult to obtain. That is why Engine Works offers many of the hard-to-find OEM service parts you need in each engine hardware finishing kit. Available for small and big block Chevrolet and small block Ford engines, all hardware in each engine finishing kit is manufactured to precise OEM dimensions to make engine assembly easy.
Not Yet Reviewed
$38.71
Engine Works cylinder head dowel pins ensure alignment between the cylinder head and block. These small cylindrical components are available in different quantities for small block, big block, and LS engines. Select the ones needed for your engine assembly.
Not Yet Reviewed
$5.31
—
$22.44
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
—
$414.99
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
$1,529.96
—
$2,099.95
ATK High Performance Chrysler Gen III Hemi remanufactured bare blocks are an economical option for your build! They're fully machined and ready to assemble. Here are product details: ATK 220A Engine Specs: * Block: Machined GEN III Hemi 5.7L (2004-2008) * Bore: 3.927 in. (Pistons size vary, final honing may be required) * Displacement: 345 cubic inch * Main journal type: Mopar GEN III Hemi * Engine block material: Cast iron * Engine block style: OEM * Engine block deck height: Standard deck * Main bolt style: 2-bolt * Main caps included: Yes * Main cap material: Powdered metal * Main cap fasteners included: Yes * Main bearings included: No * Camshaft bearings: Dura-Bond, installed and clocked to OEM position * Freeze plugs: Brass, installed and sealed * Oil galley plugs: Installed and sealed * Camshaft bearing line boring in Standard * Pos 1: 2.2921 in. – 2.2931 in. * Pos 2: 2.2765 in. – 2.2775 in. * Pos 3: 2.2607 in. – 2.2617 in. * Pos 4: 2.2449 in. – 2.2459 in. * Pos 5: 1.7187 in. – 1.7197 in. * Main, line honed: 2.7522 in. - 2.7525 in. * Cylinder honing I.D.: 3.9270 in. - 3.9278 in. * Minimum deck height: 7.880 in. - 7.870 in.
Not Yet Reviewed
$1,319.99
On Sale
World Products Motown LS iron blocks feature significant updates that make them more user-friendly and versatile. They allow you to utilize affordable small block components like rotating assemblies, oil pans, distributors, and accessories, while taking advantage of the LS high-flowing cylinder heads. World Motown LS iron blocks are designed to provide a lighter, stronger foundation for a less expensive engine build with an easier install--no matter what you are putting it in. Features include: * Lighter than an OEM LS iron block * 9.240 in. LS deck height * Uses high-flowing LS cylinder heads * Standard SBC crankshafts, rods, and bearings * Use distributor or crank trigger ignition * LS EFI or carburetor intake * LS and SBC-style motor mounts * SBC-style oil pans and pumps * SBC-style oil filter pad * SBC bellhousing pattern * New design priority main oiling system ensures reliable lubrication of main bearing * Available with ductile or billet 4-bolt main caps
Not Yet Reviewed
$3,991.76
—
$4,736.26
Ford Performance Parts 7.3L gas engine race blocks are the production-based cast iron engine blocks used in the Super Duty 7.3L gas engine. If you're looking to start off your 7.3L gas engine build in the right direction, one of these bare race blocks for your Mustang or Ford vehicle is a great option—designed to add power and performance! So if you already have your heads, camshaft, rotating assembly and other components ready to go, consider this engine block for your foundation. Additional details: * 107.2mm bore * Deck surface saw cuts deleted for higher deck strength * Includes the following components: -- Main bearing caps/hardware -- (8) piston cooling nozzles -- (1) oil pressure sender -- (4) cylinder head dowels -- (2) transmission dowels
Not Yet Reviewed
$1,751.99
Ford Performance Parts 2018 Gen 3 5.0L Coyote production cylinder blocks are original equipment for the 2018 Mustang GT 5.0L. They feature a plasma-transferred wire arc spray weld liner coating. This provides improved durability and heat transfer, reduced friction, and weight savings compared to previous Mustang GT aluminum blocks. All Ford Performance 2018 Gen 3 5.0L Coyote production cylinder block features are finish-machined, including head deck and crank bore. Features and items: * 93.0mm bore * Cylinder bores are 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
Not Yet Reviewed
$1,304.99
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
Edelbrock LS bare race blocks are designed to meet the needs of today's high performance engine builders and racing enthusiasts. They are available in standard and tall deck height combinations and are engineered for maximum clearance around a 4.600 in. stroke crankshaft. With their unique design, Edelbrock engineers were able to minimize windage in the rotating assembly, leading to superior engine lubrication at higher rpm. To make them friendly for existing race applications, these blocks contain both factory and motor plate race mounts for Gen I, II, III, and IV engines. Each LS bare race block receives a CT scan to ensure maximum performance and consistency. Standard features include: * Designed from aircraft-quality A357 T-6 aluminum * Siamese cast bore walls (4.125 in. or 4.165 in. diameter) with press-in cast iron sleeves * Machined with 55mm cam bearing journal * Available in standard (9.240 in.) and tall (9.750 in.) deck heights with beefy deck thicknesses (.500 in. standard/.750 in. tall deck); standard (5.87 in.) and tall (6.38 in.) deck cylinder sleeves are available * 6-head bolt design with full water jacket around cylinder walls; large windows in the valley allow access to an inboard 6th head bolt * Block design includes large front and rear -12AN side feeds for serious dry sump setups * Material for oversized lifters with lifter bosses are designed to clear tie bar-style lifters
Not Yet Reviewed
$6,904.95
Modal Header
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
