CP-Carrillo SC7111-4 Forged Dish Piston & Ring Kit Honda B-Series 81.5mm

Featuring an 81.5mm (3.209 in.) bore diameter, these pistons are purpose-built for high-performance street and competition applications including turbocharged, supercharged, nitrous, and naturally aspirated builds. Each piston is CNC-machined and balanced to within ±1 gram for exceptional rotating assembly precision.

Key Specifications:

• Bore: 81.5mm (3.209 in.)
• Stroke: 87.20mm
• Rod Length: 138.000mm
• Compression Height: 1.181 in.
• Piston Head Volume: +1.40cc
• Piston Style: Dish with four valve reliefs
• Material: High-strength forged aluminum

Key Features:

• Full radius dome design for optimum combustion efficiency
• Deep valve relief depth accommodates high-lift camshafts
• Made for +1mm valve sizes
• Custom skirt cam and barrel design for improved ring seal and reduced friction
• Accumulator grooves to reduce ring flutter at high RPM
• Double pin oilers with force-fed oil ring
• Pick-lock grooves for easy lock removal during assembly
• Pin fitting included at no additional cost
• Manufactured in the USA

The SC7111-4 is compatible with B16A blocks at 9.8:1 compression, or a B18 block paired with a B16A or B18C head at 11:1 compression. CP-Carrillo's climate-controlled inspection department and 5-axis machining capability ensure every piston meets the highest dimensional and quality standards for serious engine builds.