CP Pistons SC7428 Subaru EJ257 Forged Piston Kit

CP Pistons SC7428 Subaru EJ257 Forged Piston Kit

The CP Pistons SC7428 Forged Piston Kit is engineered for Subaru EJ257 turbocharged engine builds, including WRX STI applications. Manufactured in the USA from premium 2618 forged aluminium, these pistons are precision CNC machined to deliver exceptional strength, reliability and performance for high-boost street, drag and circuit racing applications. Designed to withstand extreme cylinder pressures, they provide the durability and tuning flexibility expected from CP-Carrillo.

Featuring a 100.50 mm (+1.00 mm oversize) bore, 79 mm stroke compatibility, 130.5 mm connecting rod length, 30.7 mm compression height, and a 9.0:1 compression ratio, the SC7428 is ideally suited to serious EJ257 performance engine builds. Deep valve reliefs accommodate high-lift camshafts and +1 mm oversized valves, while accumulator grooves and dual forced pin oilers maximise ring seal and wrist pin lubrication under demanding operating conditions.

Features

• Premium 2618 forged aluminium construction

• 100.50 mm (+1.00 mm oversize) bore

• 9.0:1 compression ratio

• Suits Subaru EJ257 turbo engine builds

• 79 mm stroke compatibility

• 130.5 mm connecting rod length

• 30.7 mm compression height

• 23 mm wrist pin

• Deep valve reliefs for high-lift camshafts

• Compatible with +1 mm oversized valves

• Precision CNC machined and weight matched to ±1 gram

• Accumulator grooves for improved ring sealing

• Dual forced pin oilers for enhanced wrist pin lubrication

• Includes high-performance piston rings, wrist pins and pin locks

• Fully CNC machined and manufactured in the USA

• Ideal for high-boost street, drag and circuit racing builds

Manufactured to CP-Carrillo's renowned motorsport standards, the SC7428 piston kit delivers outstanding strength, precise fitment and long-term durability, making it an excellent choice for serious Subaru EJ257 performance engine builds.