Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp Subaru WRX / STI EJ25 2004-2021 FocusRS_2016-2018 (Includes mounting Cup

(Includes mounting Cup

5-wire wideband sensor design

2x Sport Brake Pads (2x Rear)

-Reduces the " CLUNK " when shifting hard

ACL is an engine builder's top choice for its quality and consistency

Mahle Pistons PowerPak 99.5mm Bore 8.5:1 Comp Subaru WRX / STI EJ25 2004-2021 FocusRS_2016-2018 (Includes mounting CupPart #: 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