Manley Forged Piston Set, BMW N55 / S55

Manley Platinum Series pistons are meticulously crafted with top-tier materials and engineering, ideal for professional engine builders and tuners seeking both performance and longevity.

Crafted from 2618 alloy forgings, sourced domestically for superior quality, strength, and performance, these pistons ensure optimal performance under high-stress conditions. Paired with premium Chrome Moly wrist pins, or optional 9310 alloy upgrade for additional resilience, Manley pistons prioritize both power and resilience.

Manley maintains exacting standards for piston ring lands and grooves for enhanced ring seal and maximum power output. The cam and barrel profiles of these pistons are expertly designed to deliver substantial power while minimizing wear on cylinder walls.

Utilizing unique fixturing techniques, Manley enables skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.