Carrillo SC7116X-1 Forged Piston Honda/Acura B16A B18 81.5mm 11.2:1

The CP-Carrillo SC7116X-1 is a single forged performance piston designed for Honda and Acura B-series engines. Part of CP-Carrillo's Sport Compact shelf piston lineup, this piston is engineered for naturally aspirated (all-motor) applications requiring a high-compression, lightweight forged piston upgrade over the factory unit.

Key Specifications:

• Bore Diameter: 3.209 in. (81.50mm)
• Stroke: 77.4mm
• Rod Length: 134.3mm
• Compression Height: 1.181 in.
• Dome Volume: 7.7cc
• Advertised Weight: 251g
• Compression Ratio: 11.2:1 (B16A) / 12.5:1 (B18A/B with B18C1 head) / 12.2:1 (B18A/B with B16A head)
• Design: X-style forged piston — intended for all-motor (naturally aspirated) use only
• Sold: Individually (single piston)

Key Features:

• Forged from CP-Carrillo's proprietary high-strength alloy for superior strength-to-weight ratio
• Designed for oversized valves and high-lift camshaft compatibility
• Precision CNC-machined for accurate fitment and consistent compression
• Multi-step inspection process including magnaflux and Rockwell hardness testing ensures quality
• Part of CP-Carrillo's Sport Compact shelf line — available in a wide range of bore sizes and compression ratios
• Made in the USA

The SC7116X-1 is the ideal choice for B-series Honda and Acura engine builds targeting maximum naturally aspirated power. Whether refreshing a single cylinder or sourcing replacement pistons one at a time, CP-Carrillo delivers race-proven quality in every component.