M20 2.5L Mahle Motorsport Piston Set

Developed by BimmerHeads in collaboration with Mahle Motorsport, this PowerPak piston set is engineered specifically for the BMW M20B25. Built from Mahle's proprietary M142 alloy, these pistons deliver OE-like reliability without the longevity trade-offs of a typical forged piston.

• Fits: BMW M20B25 engines with 885 cylinder heads
• 85mm bore
• 10:1 compression ratio
• 135mm connecting rod length
• 75mm stroke
• Mahle Motorsport M142 alloy
• Phosphate coating
• Grafal anti-friction piston skirt coating
• Lightweight slipper-skirt forgings
• High-strength, lightweight German wrist pins
• Race-proven round-wire wrist pin locks
• Low-drag piston ring pack

Pair these pistons with our Super Sport cylinder head and performance camshaft for a higher-compression M20B25 build without increasing stroke.