Overview
ATK High Performance Chevy LM7 5.7L/347 Short Blocks
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.
