specifically for the M20B20

260" straight walled

Seat Pressure Options:

providing increased capacity to withstand the rigorous abuse often encountered on the track

Includes external dust boot for added durability

Mahle Motorsport PowerPak Piston Set, BMW N54 Compression Ratio:10.2:1 specifically for the M20B20The MAHLE Motorsport PowerPak kit is their high volume shelf stock program developed for high performance enthusiasts. These PowerPak pistons are made from 2618 alloy to allow for increased detonation resistance. PowerPak Features: Forged piston for performance applications Fully machined crown Grafal anti Friction coating on skirts reduces drag, scuffing, friction and cylinder bore wear; reduces piston noise. Phosphate coated to reduce micro welding