LS7 PowerPak F/T Piston Set 4.130 Bore

The MAHLE PISTONS LS7 PowerPak F/T Piston Set with 4.130 bore is a forged piston assembly engineered for high-performance LS-series engine builds. This kit delivers the compression ratio and ring groove geometry required for forced induction, naturally aspirated builds, or peak horsepower applications where OEM pistons reach their thermal and mechanical limits. Forged construction provides superior strength under sustained high-load conditions compared to cast alternatives, making this set the foundation of serious engine builds.

The 4.130-inch bore diameter accommodates oversized LS blocks and supports displacement increases through larger bores. Ring groove geometry—1.0 x 1.0 x 2.0 mm across three grooves—follows OEM LS specifications while the minus 3.00 cc dish reduces combustion chamber volume for higher effective compression. This design balances fuel efficiency with knock resistance, a critical consideration for turbocharged or supercharged applications where boost pressure demands structural reliability. The forged steel construction resists fatigue cracking under repeated cycles at elevated cylinder pressures and temperatures.

Builders working with LS engines—whether LS1, LS2, LS3, LS6, LS7, or LS9 blocks—select PowerPak pistons when factory parts no longer meet power target or reliability margins. Professional engine shops, dedicated track competitors, and high-mileage performance builds rely on MAHLE's piston engineering to survive dyno testing, sustained boost, or naturally aspirated revs beyond 7,000 RPM. This set ships complete and ready for installation with proper machine shop preparation and bearing selection.