Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp Subaru WRX / STI EJ25 2004-2021 Dimensions High-Strength Forged AluminumDesigned to withstand

High-Strength Forged AluminumDesigned to withstand high cylinder pressures and aggressive tuning

repeatable

Street performance builds

and can be raised from the lowest setting to max height in as little as 2 seconds

Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp Subaru WRX / STI EJ25 2004-2021 Dimensions High-Strength Forged AluminumDesigned to withstandPart #: 930285017 Pistons PowerPak 99. 5mm Bore; 3. 11 Stroke; 5. 137 Rod; 23mm Pin; 1. 209 C D; 8. 5: 1 Compression Ratio; 22cc DomeVolume; 399 Gram Weight [Subaru Impreza(2004 2007)] The Mahle PowerPak is a complete, race proven piston assembly kit composed of hand deburred, forged, performance coated pistons, high quality steel pins, round wire locks, and low drag performance rings. We race Mahle forged pistons in our dragster and highly recommend