CP-Carrillo SC7008-4 Forged Piston Set 82mm 10.0:1 CR Honda/Acura B18 4-Cylinder

Featuring an 82.0mm (+1.0mm oversize) bore and a 10.0:1 compression ratio, this piston set is purpose-built for performance street and track applications demanding strength, precision, and maximum power output.

Manufactured from 2618 forged aluminum alloy, each piston utilizes dedicated left and right forgings and is precision-balanced to within ±1 gram for smooth, high-revving performance. A 21mm wrist pin is included at no additional cost, and pin fitting is provided as well. The piston design incorporates Anti-Detonation Grooves that disrupt detonation waves to protect the top ring under high heat and RPM conditions, and a V-shaped Accumulator Groove in the second ring land captures excess blow-by between the top and second rings to maintain ring seal integrity.

Key Features:

• Bore: 82.0mm (+1.0mm oversize)
• Compression Ratio: 10.0:1
• Stroke compatibility: 87.2mm (B18C block) / 89mm (B18A/B, B20B block)
• Rod Length: 138mm (B18C) / 137mm (B18A/B)
• Wrist Pin Diameter: 21mm (included)
• Compression Height: ~30.0mm
• Piston Weight: 287 grams each
• Ring Set Part Number: CPN-3228
• Dedicated left and right forgings
• Balanced to ±1 gram
• Anti-Detonation Grooves for top ring protection
• V-shaped Accumulator Groove in second ring land
• Dual forced pin oilers
• Pick lock grooves
• Radiused valve reliefs for compatibility with oversized valves and high-lift camshafts
• Fully CNC machined with laser-engraved job number for traceability
• Rated for 550+ horsepower applications

The SC7008-4 set is compatible with the B18C block using a B16A or B18C head, as well as B18A/B and B20B blocks. These pistons are ideal for naturally aspirated high-compression builds and are engineered to work alongside high-lift camshafts and oversized valves without modification. Each kit ships complete with wrist pins, rings (CPN-3228), and locks—ready for assembly.