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Get a head start on your next engine build with our selection of short block engines. Our short blocks come with a high-quality engine block and engine internals, but...
Get a head start on your next engine build with our selection of short block engines. Our short blocks come with a high-quality engine block and engine internals, but they also give you the flexibility to finish your build off however you want. Carbureted, fuel-injected, forced induction—these blocks are the perfect starting point! You can get yours with cast or forged internal components for a wide range of applications. We’ve got 302 short blocks, 351W short blocks, 454 short blocks, and many other popular build options. We’ve even got stroker engine blocks, including 383-, 408-, and 427-cubic-inch...
Get a head start on your next engine build with our selection of short block engines. Our short blocks come with a high-quality engine block and engine internals, but they also give you the flexibility to finish your build off however you want. Carbureted, fuel-injected, forced induction—these blocks are the perfect starting point! You can get yours with cast or forged internal components for a wide range of applications. We’ve got 302 short blocks, 351W short blocks, 454 short blocks, and many other popular build options. We’ve even got stroker engine blocks, including 383-, 408-, and 427-cubic-inch configurations. Shop short block engines from ATK, BluePrint, Ford Performance Racing Parts, Chevrolet Performance, Mopar Performance, and more!
Ford Performance Parts 5.0L Gen 3 Aluminator short block crate engines are hand assembled using quality high-performance internal parts. Offered in two compression ratios, they serve as a strong foundation for the enthusiast that wants to spec and finish a Coyote build to his or her particular application and needs. Ford Performance engineers have taken care of the toughest part of building a new engine by designing a strong and durable short block that offers a wide range of power possibilities. Additional features and specifications: * 5.0L (302 cu. in.) * Precision internal balanced * Available in 12.0:1 or 9.5:1 compression ratio * Forged steel crankshaft * Mahle hard anodized forged pistons with Grafal low-friction coating * Manley H-beam connecting rods with ARP2000 bolts * 2018+ (Gen 3) production block features cross-bolted main bearing caps and thick main bearing bulkheads for bottom-end strength * Accepts Gen 1, 2, 3 or GT350 cylinder heads with corresponding generation head gasket * Assembled and ready for Coyote heads, cams, timing set, and oil system
Not Yet Reviewed
$6,499.99
These ATK High Performance Chevy LS 408 short blocks are made to handle some serious power. The foundation of any high performance engine is a rock-solid short block, so ATK designed and developed these to be just that. They feature a fully forged, balanced, and blueprinted rotating assembly that is available in a variety of configurations to fit naturally aspirated, nitrous, and forced induction builds, as well as those with 24 and 58-tooth cranks. These ATK High Performance Chevy LS 408 short blocks include the following: * GM LS Iron blocks * Aligned and hone main bores * Manley 4340 forged crankshaft * 4.00 in. stroke * Manley 4340 H-beam connecting rods * Manley forged pistons
( 3 )
$4,828.99
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$5,143.99
On Sale
ATK High Performance Chevy LQ9 6.0L short blocks with OE flat top pistons are great beginnings for your mild street build, or just as a replacement for a tired short block. ATK takes the hard work out of your project by selling blocks that are ready to complete yourself. Every great build needs a solid foundation. Start yours with one of ATK's Chevy LQ9 6.0L short blocks. Technical specifications: * Block: Seasoned 6.0L cast no. 364 or 184 * Bore/stroke: 4.030 x 3.622 * Year range: 2001-2007 * Displacement: 370 c.i.d. * Crankshaft: OEM GM 3.622 in. stroke internally balanced 24-tooth reluctor wheel * Connecting rods: OE GM forged powder metal 6.093 in. stock bolts * Pistons: OE hypereutectic flat top with no valve reliefs * Piston rings: Moly rings * Compression ratio: 64cc = 10.7:1, 68cc = 10.2:1, 72cc = 9.8:1 * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: Installed and sealed * Weight: 285 lbs.
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$3,198.99
$2,998.99
BluePrint Engines GM 383 c.i.d. short block plus stroker engines are always balanced and dyno-tested. Whether you're building a kit car, race car, hot rod, or just a sweet old memory, BluePrint Engines are ready to add a lot of muscle to your fun! Block details: * 4-bolt main * Passenger side dipstick * Cylinder wall thickness "sonic-tested" * Cylinders computer-honed to tolerance of .0002 in. Rotating assembly details: * Crankshaft * Pistons * Connecting rods * Moly rings * High-volume oil pump * Heavy-duty single roller timing set * Harmonic balancer * Hydraulic roller camshaft and lifters * Oil pan * Brass freeze plugs
( 8 )
$4,899.00
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$5,499.00
Start your build with a rock-solid bottom-end with these ATK High Performance Chrysler 408 A Stroker short blocks. These short blocks are built using high-quality components that are all hand-fit and balanced to create a reliable bottom-end that's ready to get your musclecar or truck moving. Just top the engine off with your own parts to build a custom engine that is designed to meet your goals. These ATK High Performance Chrysler 408 A Stroker short blocks include the following: * Handpicked and seasoned OE Magnum 1993-2001 blocks * Aligned and hone main bores * Nodular iron internally balanced crankshaft * 4.00 in. stroke * 4340 forged I beam connecting rods with ARP 8740 bolts * Hypereutectic pistons with 23.5cc dish * Plasma-moly rings * Approximate Compression Ratios: 62cc = 9.7:1 / 68cc = 9.2:1 / 72cc = 8.9:1
( 4 )
$2,998.99
If you want big block power for your ride but want to have a say in the final product, Chevrolet Performance has the solution. Their 502 c.i.d. short blocks can be configured to deliver all of the muscle you want. The heart of these powerhouses is the same short block that GM uses for their 502 c.i.d., 502 hp bruiser—so you know they can crank out the power. Chevrolet starts with a Gen VI 4-bolt main block with a one-piece rear main seal and priority oiling for the main bearings. To that, they add: an externally balanced, forged crank that's shot-peened and magnafluxed; forged steel "dimple" connecting rods; forged aluminum pistons; a single-roller heavy-duty timing chain set; and a hydraulic roller camshaft. The cam has 0.527 in. of intake lift and 0.544 exhaust lift, with 110 degrees of lobe separation. Duration at 0.050 in. of lift is 224 degrees for the intakes, and 234 for the exhausts. These long blocks come complete with a powdercoated cast aluminum timing cover (will not accommodate double-row chains); aluminum cylinder heads and valve covers; a 6 qt. truck-type oil pan (will not fit Chevelle, Camaro, Nova, or Impala); a 14 in. flexplate; and an 8 in. harmonic balancer.
( 1 )
$7,334.37
Start your next engine build off the right way with these ATK High Performance 1988-92 Ford 460 short blocks. ATK hand-builds, balances, and blueprints these engines to ensure that they are a smooth-running, reliable base for your next engine. These short blocks are prefect for building replacement motors for your car, truck, or hot rod. These ATK High Performance 1988-92 Ford 460 short blocks include the following: * Handpicked and seasoned block * Aligned and honed main bores * OE cast crankshaft * 3.85 in. stroke * OE connecting rods * Hypereutectic D-cup pistons
( 5 )
$1,715.99
Big power requires a solid foundation, so start your next build with one of these ATK High Performance Chevy 427 Dart Race Series short blocks. These short blocks are built, balanced, and blueprinted to be the strongest and most reliable short block available for your race car or hardcore street car. These ATK High Performance Chevy 427 Dart Race Series short blocks include the following: * Dart SHP block * Aligned and honed main bores * 4340 forged crankshaft * 4.00 in. stroke * 4340 forged H-beam connecting rods * Forged flat-top pistons
Not Yet Reviewed
$5,798.99
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$9,249.99
Hardcore engines need a hardcore bottom end; that's why ATK High Performance developed these Chevy 383 Stroker Race Series short blocks. These short blocks are built around the strongest components available so that they can handle serious horsepower for your race car or hardcore street machine. These ATK High Performance Chevy 383 Stroker Race Series short blocks include the following: * Handpicked and seasoned 4-bolt main block * Aligned and honed main bores * Forged 4340 crankshaft * 3.75 in. stroke * Forge H-beam connecting rods * Forged dish top pistons
( 3 )
$3,828.99
ATK Chevy LM7 383 short blocks support your build with a solid foundation. Produced for the 1999-2007 trucks, LM7 engines are very popular engines to swap into musclecars and other LS swap vehicles. ATK High Performance Chevy LM7 383 short blocks are built for naturally aspirated engines up to 700 hp. Your ATK LM7 engine may include these components for optimal performance: * Block: GM LM7 5.3L * Bore/stroke: 3.903 x 4.000 * Displacement: 383 cu. in. * Crankshaft: K1 4340 forged steel, internally balanced 24-tooth * Connecting rods: Scat Premium Pro 4340 forged I-beam with ARP 8740 bolts * Pistons: Wiseco 2618 forged aluminum with coated skirts * Piston rings: Wiseco GFX (alloy steel top ring) * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: installed and sealed * Weight: 285 lbs.
Not Yet Reviewed
$4,098.99
Start with the right foundation for your Blue Oval build--start with Ford Performance Parts 363 c.i.d. Boss short block assemblies. Build a powerful 8.2 in. deck engine for your vintage muscle, street rod, Fox body, or late model Mustang by starting with the same short block used in the 500 hp Z363 crate engines. These Ford Performance Parts Boss short block assemblies take the bore out to 4.125 in. for 363 stroked cubes of power. Plus, strength from within is provided by the forged crankshaft and I-beam connecting rods. Power your next project with Ford Performance Parts 363 c.i.d. Boss short block assemblies. Additional technical specifications: * Engine type: 302 based small block Ford * Bore x stroke: 4.125 in. bore x 3.400 in. stroke * Block: Boss 4-bolt main block M-6010-BOSS302 * Piston to Deck Height: .01 in." below deck (nominal) * Crankshaft: SCAT forged steel * Connecting rods: SCAT forged steel I-beam connecting rods with floating pins and ARP bolts * Pistons: Mahle forged aluminum, 1.5mm, 1.5mm, 3.00mm rings, valve reliefs for X306, X307, Z304DA, Z304P, N351, and other inline valve Windsor cylinder heads * Pistons designed for 20 degree valve angle heads and will fit stock or most spread valve guide centerlines; 6cc valve pockets, check piston to valve clearance * Compatible with most aftermarket performance cylinder heads * Designed for M-6049-X306//X307/Z304DA/Z304P and N351 cylinder heads. Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads * Hydraulic roller camshaft compatible * Recommended cylinder head fasteners M-6065-BOSS head bolts or M-6014-BOSS studs depending on application * Requires head gaskets M-6051-R351 * Internally balanced; requires "0" balance flywheel and damper * High performance harmonic balancer M-6316-D302 recommended * High-volume oil pump M-6600-D2 recommended * 302 bolt pattern oil pan and timing cover * Built with all new parts * Photo and specifications may vary
( 1 )
$6,005.99
ATK Chevy LM7 5.7L/347 short blocks provide a solid foundation for your build. Produced for the 1999-2007 trucks, LM7 engines are very popular engines to swap into musclecars and other LS swap vehicles. ATK High Performance Chevy LM7 5.7L/347 short blocks are built for naturally aspirated engines up to 700 hp. Your ATK LM7 engine may include these components for optimal performance: * Block: GM LM7 5.3L * Bore/stroke: 3.903 x 3.622 * Displacement: 5.7/347 c.i.d. * Crankshaft: OE reground 3.622 in., internally balanced 24-tooth * Connecting rods: Scat Premium Pro 4340 forged I-beam with ARP 8740 bolts * Pistons: Wiseco 2618 forged aluminum with coated skirts * Piston rings: Wiseco GFX (alloy steel top ring) * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Brass installed and sealed * Oil galley plugs: installed and sealed * Weight: 285 lbs.
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$3,298.99
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$3,329.99
Looking to upgrade your old engine using your existing heads? ATK high performance Chevy 377 Stroker short blocks use a 100 percent new American-made cast iron block outfitted with a Scat crank kit. All the hard work is done, you just need to finish it off. These crate engines are available with forged H-beam or I-beam connecting rods; dish top or flat top pistons; forged 4340 steel or nodular iron crankshaft; and other options. Note: Performance short blocks are based on dyno-proven combinations built with name brand parts. Stroker engine built over size of stock stroke. Short block strapped and shipped on wooden pallet crate.
Not Yet Reviewed
$3,298.99
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$4,499.99
On Sale
Start your next engine build with one of these ATK High Performance Chevy LQ4 6.0L short blocks. The LQ4 is an ultra-tough basis for high-horsepower engines in their stock form, but ATK improved on it. These engines are hand-built, balanced, and blueprinted using top-quality parts. Don't waste time trying to salvage a high-mileage short block when you can get a fresh mill that is ready for your choice of components to make it your own. These ATK High Performance Chevy LQ4 6.0L short blocks include the following: * Handpicked and seasoned 6-bolt main block * Aligned and honed main bores * OE steel crankshaft * 3.622 in. stroke * OE connecting rods * Hypereutectic dish top pistons
( 1 )
$3,198.99
$2,998.99
ATK High Performance Chevy 632 short blocks are based on dyno proven combinations built with name brand parts. Each short block is hand-built and inspected for precision tolerances. Rotating assemblies are balanced; and stroker builds are oversize of stock bore and stroke. Short blocks are shipped strapped on a wooden pallet crate. Engine Specifications: * Block: Dart Big M Sportsman 4-bolt main 2-piece rear main seal * Bore/Stroke: 4.600 in. x 4.750 in. * Displacement: 632CI * Crankshaft: Scat 4340 forged internally balanced * Rods: Scat 4340 forged H-beam with ARP 8740 bolts * Pistons: 2618 forged +3.4cc flat tops * Compression ratios: 112cc = 11.3:1 / 118cc = 10.8:1 / 121cc = 10.6:1 (can vary due to deck height/gasket thickness) * Rings: Plasmamoly * Camshaft bearings: Dura-Bond, installed and clocked to OEM position * Freeze plugs: Brass, installed and sealed * Oil galley plugs: Installed and sealed Recommended Components: * Balancer: Internal balance * Flexplate / Flywheel: Internal balance * Head gasket: .038 in. or per application Engine Info: * Oil: 10W30 Conventional / Non-Synthetic for first 3,000 miles * Oil filter: Wix or K&N per application * Head gaskets: .038 in. or per application
Not Yet Reviewed
$7,526.99
ATK High Performance Chevy Gen V LT1 416 short blocks are built for naturally aspirated engines, boost or nitrous. ATK starts with a new GM LT block and outfits it with a Manley 4340 forged crankshaft, H-beam rods with ARP2000 bolts, Manley 2618 forged pistons, and Total Seal CS AP ring package with steel top rings. These short blocks will have the factory piston squirters plugged. Engine Specifications: * Block: New GM LT1/LT4 * Bore/Stroke: 4.065 in. x 4.000 in. * Displacement (cu.in): 416 c.i.d. * Crankshaft: Manley 4340 forged 58-tooth reluctor wheel * Rods: Manley 4340 forged H-beam 6.125 in. ARP 2000 bolts * Pistons: Choice of 2618 forged +10cc or +20cc dished * Rings: Total Seal CS AP steel top ring with Napier 2nd ring set * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Installed and sealed * Oil galley plugs: Installed and sealed Recommended components: * Balancer -- Internal balance * Flex plate / Flywheel -- Internal balance * Head gasket: .051 in. or per application * Oil pump: Factory Engine Info: * Oil: 5W30 non-synthetic for first 3,000 miles * Oil filter: Wix or K&N, per application
Not Yet Reviewed
$6,998.99
Your engine needs a rock-solid foundation to make the horsepower you crave; that's where these ATK High Performance Chevy 383 Stroker short blocks come in. With these blocks, all of the hard work has been done for you. Everything comes machined, clearanced, balanced, and blueprinted, so you have a bulletproof bottom-end that is ready to run. Just decide how mild or wild you want to go. These ATK High Performance Chevy 383 Stroker short blocks include the following: * Handpicked and seasoned 4-bolt main block * Aligned and honed main bores * Nodular iron crankshaft * 3.75 in. stroke * I-beam connecting rods * Hypereutectic dish top pistons
( 2 )
$3,828.99
Simplify your engine power build by starting with Dart small block Ford 347 c.i.d. short block engines. These dyno-tested short block combinations start with their precision-machined SHP Ford block. To these reliable blocks, they add quality components--a high-quality cast steel crankshaft, forged 4340 I-beam connecting rods, and forged pistons--to help you gain the performance that you want at a price that you can afford. When you want more than stock but don't know where to begin, Dart can help with their quality, high performance small block Ford 347 c.i.d. short block engines.
( 2 )
$7,621.99
Decisions, decisions! When it comes to building engines, many people start with small changes and over time build for greater performance. Others go full-in from the start. Ford Performance Parts 5.3L Modular Stroker short blocks use pistons with a dish compatible with 2, 3, or 4- valve heads—naturally aspirated or supercharged. Ford Performance engineers start with a Boss modular block and add an Eagle forged steel crankshaft, Mahle forged aluminum pistons, and Eagle forged H-beam connecting rods with floating piston pins. These short blocks are internally balanced, bored and stroked to 5.3L, and ready for your specific needs. Ford Performance Parts 5.3L Modular Stroker short blocks provide an incredible base for your present and future ambitions. Additional features and specifications: * Engine type: 4.6L based Modular short block * Ford Performance Parts M-6010-BOSS50 cast iron performance block * Displacement: 5.3L/323 c.i.d. * 3.701 in. bore x 3.750 in. stroke * Mahle forged aluminum pistons * Designed for 2, 3 or 4-valve cylinder head combinations (piston to valve check required depending on camshaft) * Eagle 5.850 in. forged steel H-beam connecting rods with ARP 2000 bolts * New high-pressure oil pump * Eagle 3.750 in. stroke forged steel crankshaft with 8-bolt flywheel pattern * Neutral balance rotating assembly * 2005-10 Mustang 3V applications will need motor mount adapter part number M-6031-BOSS50
( 1 )
$7,147.99
ATK High Performance Chrysler Gen III Hemi 392 short blocks offer two robust bottom ends for your hot rod. One is perfect for your potent street or race build, while the other is designed for engines that will be running boost or nitrous. These Hemi blocks feature top-of-the-line Scat forged stroker kits. They include clocked camshaft bearings set to the OEM position, plus installed/sealed freeze plugs and oil galley plugs. You wouldn't build a house on sand, so don't start your big block Mopar build with anything less than ATK High Performance Chrysler Gen III Hemi 396 short blocks. Features, items, and specs may include: * Seasoned OE main block (ARP main studs with boost/nitrous version) * 3.927 x 4.050 bore/stroke * Scat 4.050 in. stroke crankshaft (internally balanced) * Scat 4340 forged 6.125 in. connecting rods with ARP bolts * Forged -2cc flat top pistons * Moly or Plasmamoly with steel top ring gapped for boost/nitrous piston rings (depending on application) * 81cc=9.9:1/85cc=9.6:1/89cc=9.2:1 compression ratio (based off .028 in. gasket)
Not Yet Reviewed
$4,199.99
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$4,499.99
ATK High Performance Chevy Gen V LT1 376 short blocks are built for naturally aspirated engines, boost or nitrous. ATK starts with a new GM LT block and outfits it with a Manley 4340 forged crankshaft, H-beam rods with ARP2000 bolts, Manley 2618 forged pistons and Total Seal CS AP ring package with steel top rings. These short blocks will have the factory piston squirters installed. Engine Specifications: * Block: New GM LT1/LT4 * Bore/Stroke: 4.065 in. x 3.622 in. * Displacement (cu.in): 376 c.i.d. * Crankshaft: Manley 4340 forged 58-tooth reluctor wheel * Rods: Manley 4340 forged H-beam 6.125 in. ARP 2000 bolts * Pistons: Choice of 2618 forged +12cc dished or -2cc domed * Rings: Total Seal CS AP steel top ring with Napier 2nd ring set * Camshaft bearings: Installed and clocked to OEM position * Freeze plugs: Installed and sealed * Oil galley plugs: Installed and sealed Recommended Components: * Balancer -- Internal balance * Flex plate / Flywheel -- Internal balance * Head gasket: .051 in. or per application * Oil pump: Factory Engine Info: * Oil: 5W30 non-synthetic for first 3,000 miles * Oil filter: Wix or K&N, per application
Not Yet Reviewed
$6,998.99
Dart small block Chevy 427 c.i.d. engines are professionally-built short blocks with brand new premium components—ideal for Street performance and Sportsman racing. Simplify engine building and save time with these pre-engineered, dyno-tested short block combinations. The quality component packages are designed to allow you to build more powerful and durable engines at a very affordable cost. SPECIFICATIONS: * 427 cu. in. short block * Internally Balanced * Special High Performance Dart Block (SHP) * 4.125 in. Bore x 4.000 in. Stroke * Plate Honed Cylinders * Forged 4340 Steel Crankshaft * Forged 4340 H-Beam Rods - 7/16" ARP 2000 Bolts * Forged Flat Top Pistons w/ Full Floating Pin * MAHLE Rings * Clevite Bearings * Coated Cam Bearings * Options Available: 20cc Dished Pistons * Reduce CR by 1.2 * CR 11.4:1 with 64cc chamber and .041 in. gasket * CR 10.5:1 with 72cc chamber and .041 in. gasket * Upgrade available to Little M or SBC Race Series Aluminum blocks * Must use small base circle camshaft
Not Yet Reviewed
$8,855.90
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$9,662.99
These Chevrolet Performance 454 c.i.d. HO short block assemblies will give your vehicle a serious power upgrade. They are the foundation for GM's 454/425 hp crate engines. Features include: * Gen VI 4-bolt main block with mechanical fuel pump provisions * Fuel pump pushrod * 1053 forged steel crankshaft, externally balanced * Forged steel LS6/LS7 shot-peened and magnafluxed connecting rods with 7/16 in. rod bolts * Forged aluminum pistons * Black painted steel 6 qt. oil pan * Black powdercoated aluminum timing cover * 8 in. harmonic balancer * 14 in. automatic flexplate
Not Yet Reviewed
$5,481.69
ATK High Performance Chevy Gen V 489/496 short blocks deliver a bulletproof bottom end that is perfect for your potent street or race build. These are later model Gen V blocks featuring top-of-the-line Scat forged stroker kits (no provisions for mechanical fuel pumps). They include clocked camshaft bearings set to the OEM position, plus installed/sealed freeze plugs and oil galley plugs. You wouldn't build a house on sand, so don't start your big block Chevy build with anything less than ATK High Performance Chevy Gen V 489/496 short blocks. Features, items, and specs may include: * 4-bolt OE main block featuring one-piece seal * Up to 4.310 x 4.250 bore/stroke * One-piece. Scat 4.250 in. stroke crankshaft (internally balanced) * Scat 4340 forged 6.385 in. connecting rods with ARP 8740 bolts * Forged +20cc dome pistons * Moly piston rings
Not Yet Reviewed
$4,825.99
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