Manley 612207C-1 Platinum Series Single Piston 100.25mm Bore

The Manley 612207C-1 is a single high-performance forged piston from Manley's renowned Platinum Series lineup. This precision-engineered piston is designed for Subaru 2.5L EJ257 WRX STi applications and delivers exceptional strength and reliability for turbocharged and high-boost builds.

Key Features:

• Forged from domestic 2618 high-strength aluminum alloy for superior durability in extreme conditions
• 100.25mm bore diameter (+0.25mm oversize) with proven cam and barrel skirt profiles
• Moly-coated skirts reduce friction and protect cylinder walls
• Pressure balance groove design enhances stability at high RPM
• Unique single-operation fixturing ensures perfect ring groove to skirt squareness for maximum sealing
• Accommodates +1mm oversized valve clearances for performance cylinder head upgrades
• Includes premium chrome moly wrist pin and round wire locks

Manley's proprietary manufacturing process machines the ring grooves and skirt in a single fixturing operation, guaranteeing precise alignment and optimal ring seal. This translates to more power, better efficiency, and enhanced durability. Trusted by professional engine builders and elite tuners worldwide, Manley Platinum Series pistons are engineered to withstand the punishment of power-adder and nitrous applications while maintaining long service life.