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ATK High Performance Chevy LQ4 6.0L 460 hp long block crate engines lay down impressive power that can be run with factory fuel injection or retrofitted with a carburetor. They're 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's ready for your choice of components to make it your own. ATK Chevy LQ4 6.0L 460 hp long block crate engines include: * 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 * Aluminum cylinder heads * Hydraulic roller camshaft * Timing chain and gear set * 1.7:1 ratio rocker arms * 24-tooth reluctor
( 10 )
$5,049.99
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
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
ATK High Performance Proprietary Chrysler 3.8L crankshafts are 100 percent new. They feature OEM standard size main and rod journals and are superior options vs. turning an inferior used crankshaft and ending up with oversized bearings.
Not Yet Reviewed
$374.99
With ATK High Performance Chevy LM7 5.3L 385 hp long block crate engines expect big mid to upper end power and a noticeable idle. They were designed to be performance upgrades for a 1999-2007 Chevy truck LM7 or an LS swap in a hot rod. Technical specifications include: * Horsepower: 385+ * Torque: 390+ * Block: GM 5.3L iron LM7 * Bore/stroke: Up to 3.809 x 3.622 * Year range: 1999-2007 * Displacement: 323 c.i.d. * Crankshaft: OEM GM 3.622 in. stroke internally balanced 24 tooth reluctor wheel .857 in. flange * Connecting rods: OE GM forged powder metal 6.093 in. stock bolts * Pistons: Hypereutectic dish * Piston rings: Moly rings * Compression ratio: 9.5:1 compression * Camshaft: Hydraulic roller * Camshaft specifications: Custom grind * Camshaft bearings: Installed and clocked to OEM position * Cylinder heads: OE aluminum 61.15cc 1.89/1.55 * Freeze plugs: Brass installed and sealed * Rocker arms: OE powdered metal 1.7 ratio * Oil Galley plugs: Installed and sealed * Weight: 385
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$4,189.99
ATK High Performance Chrysler 360 Magnum 350 HP base long block crate engines incorporate Engine Quests upgraded casting with the following benefits: * Thicker deck for greater strength * Improved design resists cracking * Superior port finish for increased flow * Water flow redesigned for greater thermal conductivity * Hardened exhaust seats * CNC-machined guides and seats Engine specifications: * HP: 350 * TQ: 430 * Block: OE Magnum roller block 1993-2001 * Bore/stroke: 4.040 in. x 3.580 in. * Displacement: 360 cu. in. * Crankshaft: OE cast * Rods: OE 6.123 in. * Pistons: Hypereutectic 9.3:1 compression * Rings: Chromoly * Camshaft: Hydraulic roller * Cam specs: 207/217 at 50 .496/.496 112 LSA * Timing chain: Double roller * Cylinder heads: New upgraded Engine Quest cast iron 62cc/172cc 1.78/1.50 * Rocker arms: Steel 1.6 pedestal rockers * Oil pan: 5 qt. OE front sump * Oil pump: Melling STD volume (does not come with an oil pump driveshaft)
Not Yet Reviewed
$4,098.99
ATK High Performance Chrysler 360 Magnum 350 HP complete long block crate engines incorporate Engine Quests upgraded casting with the following benefits: * Thicker deck for greater strength * Improved design resists cracking * Superior port finish for increased flow * Water flow redesigned for greater thermal conductivity * Hardened exhaust seats * CNC-machined guides and seats Engine specifications: * HP: 350 * TQ: 430 * Block: OE Magnum roller block 1993-2001 * Bore/stroke: 4.040 in. x 3.580 in. * Displacement: 360 cu. in. * Crankshaft: OE cast * Rods: OE 6.123 in. * Pistons: Hypereutectic 9.3:1 compression * Rings: Chromoly * Camshaft: Hydraulic roller * Cam specs: 207/217 at 50 .496/.496 112 LSA * Timing chain: Double roller * Cylinder heads: New upgraded Engine Quest cast iron 62cc/172cc 1.78/1.50 * Rocker arms: Steel 1.6 pedestal rockers * Oil pan: 5 qt. OE front sump * Oil pump: Melling STD volume * Balancer: Externally balanced * Intake manifold: Edelbrock performer RPM air gap dual plane * Distributor: Pro billet RTR (Iron Gear) * Water pump: OE early pump * Carburetor: Quick Fuel 680 cfm vacuum secondary's electric choke * Fuel pump: Holley mechanical 110 gph * Spark plugs: Autolite * Spark plug wires: 8mm
Not Yet Reviewed
$6,898.99
ATK offers select parts for your build, including cylinder heads. They use them in their engine combinations and are available to complete your small block Ford engine or upgrade existing components. ATK High Performance 205cc SBF aluminum cylinder head features: * A356 aluminum construction * Stainless steel intake and exhaust valves * Manganese Bronze valve guides * Viton® valve seal * Powder meatal valve seats * Steel retainers with 7-degree bead lock keepers * Spark plug dimensions: 14mm x .750 in. with gasket seat * Head bolt diameter: 1/2 in.
Not Yet Reviewed
$698.99
ATK specializes in muscle. With the highest quality internal parts and dyno-proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty. This ATK High Performance GM LM7 5.3L 500 hp base long block crate engine is fitted with AFR heads. Engine specifications: * Horsepower: 500 * Torque: 440 * Block: OE LM7/5.3L iron * Bore/stroke: up to 3.903 in. x 3.622 in. * Displacement (cu.in): up to 347c.i.d. * Crankshaft: OE GM 24 tooth reluctor wheel * Rods: OE powder metal * Pistons: Hypereutectic 10.1 compression * Rings: Moly * Camshaft: Hydraulic roller * Cam specs: Custom performance grind * Timing chain: OE single roller * Cylinder heads: -- AFR CNC ported aluminum -- 59cc/200cc -- 2.000 in. intake/1.570 in. exhaust * Rocker arms: OE 1.7 ratio with trunnion upgrade * Oil pump: Melling M295
Not Yet Reviewed
$5,199.99
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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$3,329.99
ATK specializes in muscle. With the highest quality internal parts and dyno-proven combinations of every engine built, ATK is able to add the most bang for your buck and back it up with an industry leading warranty. This ATK High Performance GM LM7 5.3L 500 hp long block crate engine is fitted with AFR heads and FiTech EFI. Engine specifications: * Horsepower: 500 * Torque: 440 * Block: OE LM7/5.3L iron * Bore/stroke: up to 3.903 in. x 3.622 in. * Displacement (cu.in): up to 347c.i.d. * Crankshaft: OE GM 24 tooth reluctor wheel * Rods: OE powder metal * Pistons: Hypereutectic 10.1 compression * Rings: Moly * Camshaft: Hydraulic roller * Cam specs: Custom performance grind * Timing chain: OE single roller * Cylinder heads: -- AFR CNC ported aluminum -- 59cc/200cc -- 2.000 in. intake/1.570 in. exhaust * Rocker arms: OE 1.7 ratio * Oil pump: Melling M295 * EFI System: -- FiTech Ultra port injection LS1 750 hp with transmission control -- Wiring harness and ECM/TCM included * Fuel injectors: FiTech 55 lb. * Spark plugs: Autolite #104 * Spark plug wires: 8mm * Balancer: Stock internally balanced
Not Yet Reviewed
$8,899.99
ATK High Performance 250cc LS1/LS6 aluminum assembled engine cylinder heads are complete new builds. They include valves, valve springs, valve spring retainers, valve stem seals, and soft plugs. All threads are checked and repaired, if necessary; and all passages and part interfaces are pressure checked. Product specifications: * Material: A356 aluminum * Bolt count: 6-bolt head * Intake port volume: 250cc * Intake port dimension: 3.227 in. H x 1.119 in. W * Intake port location: Stock cathedral port * Intake valve size: 2.080 in. * Intake valve material: Stainless steel * Exhaust port volume: 105cc * Exhaust port dimension: 1.628 in. H x 1.722 in. W * Exhaust port location: .086 in. raised * Exhaust valve size: 1.60 in. * Exhaust valve material: Stainless steel * Combustion chamber size: 61cc * Valve cover bolt pattern: Perimeter bolt * Valve angle: 11 degree * Valve spring pocket diameter: 1.610 in. O.D. * Valve spring pac: 1905 dual spring (hydraulic roller) * Valve spring setup height: 1.800 in. * Valve spring closed pressure: 160 lbs. (with retainer) * Valve spring open pressure: 1.200 in., .600 in. lift, 425 lbs. / 1.150 in., .650 in., lift 445 lbs. (with retainer) * Valve spring max lift: .650 in. * Valve guide material: Manganese bronze * Valve seal material: Viton© * Valve seat material: Powder metal * Retainer material: Titanium * Deck thickness: .750 in. * Minimum bore diameter: 3.900 in. (will not fit stock bore 4.8L/5.3L) * Flat mill: .006 in. per cc * Spark plug dimensions: 14mm x .708 in. with tapered seat * Torque specifications per application based on factory or aftermarket bolts/studs
Not Yet Reviewed
$998.99
ATK offers select parts for your build, including cylinder heads. They use them in their engine combinations and are available to complete your LS engine or upgrade existing components. ATK High Performance 260cc LS3 CNC-ported cylinder head features: * A356 aluminum construction * Stainless steel intake and exhaust valves * Manganese Bronze valve guides * Viton® valve seal * Powder meatal valve seats * Titanium retainers * Spark plug dimensions: 14mm x .708 in. with tapered seat
Not Yet Reviewed
$1,148.99
ATK offers select parts for your build, including cylinder heads. They use them in their engine combinations and are available to complete your LS engine or upgrade existing components. ATK High Performance 270cc LS3 CNC-ported cylinder head features: * A356 aluminum construction * Stainless steel intake and exhaust valves * Manganese Bronze valve guides * Viton® valve seal * Powder meatal valve seats * Titanium retainers * Spark plug dimensions: 14mm x .708 in. with tapered seat
Not Yet Reviewed
$1,198.99
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