Carrillo SC7400-1 Forged Piston and Ring Set for Subaru EJ20

The Carrillo SC7400-1 is a high-performance forged aluminum piston and ring set designed for Subaru EJ20 WRX engines. This single piston features a 92.5mm bore size (+0.5mm oversize) with an 8.5:1 compression ratio, making it ideal for turbocharged and high-performance applications.

Key Specifications:

• Bore: 3.642 inches (92.5mm)
• Compression Ratio: 8.5:1
• Compression Height: 1.285 inches
• Piston Head Volume: +8.90cc
• Wrist Pin Diameter: 0.905 inches
• Designed for 75mm stroke and 130.5mm rod length

Premium Features:

• High-strength forged aluminum construction for maximum durability
• Fully CNC-machined and balanced to +/- 1 gram
• Deep valve reliefs accommodate high-lift camshafts and oversized valves (+1mm)
• Custom skirt cam and barrel design for reduced friction
• Accumulator grooves for improved oil control
• Double pin oilers force-fed from oil ring groove
• Wrist pin and pin retainers included
• High-performance ring set included (1.2mm steel top ring, 1.5mm cast iron second ring, 4.0mm oil ring)

CP-Carrillo pistons are engineered using sophisticated computer modeling and manufactured with 5-axis CNC machining for precision and reliability. Suitable for turbo, supercharger, and nitrous oxide applications, this piston is built to withstand extreme performance demands.