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ATK High Performance Chevy LS 408 Short Blocks

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

5.0 out of 5 stars ( 4 )

$5,143.99

ATK High Performance Chevy Gen V LT1 416 Short Blocks

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

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$6,998.99

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