CP-Carrillo SC7309-6 Forged Piston and Ring Kit Nissan RB26DETT 86mm 8.5:1

The CP-Carrillo SC7309-6 is a complete forged piston and ring kit designed for the Nissan 2.6L RB26DETT inline-six engine.

Built from proprietary forged aluminum, each piston features a dome profile with no valve reliefs and is engineered to exacting tolerances for use in forced induction and power-adder builds, including turbo, supercharger, and nitrous oxide applications.

Key Specifications:

• Bore: 86.00mm (3.386 in.) — Standard bore
• Stroke: 73.68mm (2.901 in.)
• Rod Length: 121.5mm (4.783 in.)
• Compression Height: 30.30mm (1.193 in.)
• Compression Ratio: 8.5:1
• Piston Head Volume: -16.90cc (dome)
• Piston Material: Forged aluminum
• Piston Style: Dome, no valve reliefs
• Pin Diameter: 21mm (0.827 in.) — Press-fit or floating

Ring Package Included:

• Top Ring: 1.0mm steel
• Second Ring: 1.2mm cast iron
• Oil Ring: 2.8mm
• Wrist pin retainers and wrist pins included
• File fit: No | Gapless: No

• 6 forged aluminum pistons
• Full ring set (top, second, and oil rings)
• Wrist pins and retaining clips

CP-Carrillo pistons are produced using sophisticated computer modeling and 5-axis CNC machining, and are inspected in a climate-controlled environment with computerized measuring equipment. Each piston is balanced to within one gram, and the kits also include dual forced pin oilers and an accumulator groove as standard features — typically reserved for custom builds — ensuring superior sealing and ring stability under high boost conditions. Also compatible with the Nissan Stagea 260RS equipped with the RB26DETT engine.