Carrillo SC7410-4 Forged Piston Set Subaru EJ25 DOHC 100mm 8.5:1 CR

These pistons feature a 100mm bore size (+0.5mm oversize) with an 8.5:1 compression ratio, making them ideal for turbocharged applications requiring moderate boost levels.

Key Specifications:

• Bore: 100mm (3.937 inches)
• Compression height: 30.302mm (1.193 inches)
• Pin diameter: 23mm
• Ring thickness: 1.2mm x 1.5mm x 2.8mm
• Dome/Dish height: -21.8mm (dished)
• Compression ratio: 8.5:1

Performance Features:

• Deep valve reliefs accommodate oversized valves including +1mm sizes for enhanced airflow when paired with high lift camshafts
• Includes standard wrist pins (part number 905-2500-18CP1S) at no additional cost
• Features pick lock grooves for easy ring removal and accumulator groove
• Fully CNC machined and precision balanced for optimal performance

CP-Carrillo pistons are manufactured using aerospace-grade forged aluminum alloy and undergo rigorous quality control testing. The 8.5:1 compression ratio is suitable for moderate boost applications, providing excellent strength and reliability for high-performance street and track applications. This set includes four pistons with rings and pins, ready for installation in your Subaru EJ25 DOHC build.