CP-Carrillo SC7659-4 Forged Piston Set 4AGE 20V 81.5mm 12.0:1 Compression

Designed as a +0.5mm overbore (81.5mm / 3.209") shelf piston, this set is built to deliver a 12.0:1 compression ratio for maximum power extraction in high-performance and competition applications.

Key Specifications:

• Bore Diameter: 81.5mm (3.209") — +0.5mm oversize
• Compression Ratio: 12.0:1
• Compression Height: 30.7mm (1.208")
• Deck Height: +6.0mm
• Rod Length: 122mm
• Wrist Pin Diameter: 20mm
• Ring Grooves: 1.0mm x 1.2mm x 2.8mm (top, second, oil)
• Wrist Pin Part Number: CPN-3209
• Cylinder Count: 4-cylinder set
• Application Note: Naturally Aspirated (NA) configuration

Each piston in the set is forged from high-strength aluminum alloy and manufactured in the USA to CP-Carrillo's exacting tolerances. All pistons are balanced within one gram and include matching wrist pins and locks. The design is compatible with oversized valves and high-lift camshafts, making these pistons an ideal choice for engine builders targeting maximum naturally aspirated performance on the 4AGE 20V platform.

CP-Carrillo is a trusted name in motorsport, supplying forged pistons and connecting rods to professional racing teams and performance engine builders worldwide. The SC7659-4 set reflects that same commitment to precision engineering, durability, and race-proven performance.