CP Pistons SC7015-4 Forged 81mm 9.8:1 Piston & Ring Set for 94-01 Acura Integra

Vehicle Fitment

• 1994-2001 Acura Integra GS-R (B18C1, 1.8L DOHC 4-cylinder)

Fitment Notes

• Designed for B18 block with B18C1 heads; may require matching ring end gaps for custom builds
• Not compatible with stock piston bore sizes smaller than 81.00 mm without reboring
• CARB restricted; may not be legal for street use in California or other CARB jurisdictions

Features

• Forged aluminum construction for strength and durability under high RPM
• Fully CNC machined for precise dimensions and consistency
• Dedicated left/right forging to optimize balance and wear in high-stress applications
• Balanced to ±1 gram per piston to ensure engine smoothness
• Includes wrist pins at no extra cost; piston pin fitting provided
• Radiused valve reliefs and accumulator groove to clear high lift cams and promote ring sealing
• Multiple forced pin oilers and pick-lock grooves for reliable ring lubrication and lock retention
• Flat top piston design with dish (~-3.0cc) to achieve 9.8:1 compression ratio with stock B18C1 heads

Specifications

• Bore Size: 81.00 mm (≈ 3.189 in) :contentReference[oaicite:0]{index=0}
• Stroke: 87.20 mm / ~89 mm depending on crank used :contentReference[oaicite:1]{index=1}
• Connecting Rod Length: 137-138 mm (depending on configuration) :contentReference[oaicite:2]{index=2}
• Compression Height: ~1.181 in :contentReference[oaicite:3]{index=3}
• Piston Material: Forged 2618 aluminum alloy :contentReference[oaicite:4]{index=4}
• Piston Ring Sizes: approx 1.0 / 1.2 / 2.8 mm (top / second / oil ring) :contentReference[oaicite:5]{index=5}
• Wrist Pin Size: 21 mm :contentReference[oaicite:6]{index=6}
• Advertised Piston Dish: -3.0 cc to help set compression ratio to 9.8:1 :contentReference[oaicite:7]{index=7}
• Set Quantity: 4 pistons + full ring set :contentReference[oaicite:8]{index=8}

Included Components

• 4x Forged pistons (SC7015-4)
• 4x complete ring sets
• 4x wrist pins
• Pin fitting supplied

Product Description

The CP Pistons SC7015-4 piston & ring set is designed for high performance in the Honda/Acura B-series platform, especially for the B18C1 engine. Featuring 81.00 mm bore pistons forged from 2618 aluminum, the set delivers a 9.8:1 compression ratio when used with the matching heads and provides excellent aluminum strength and thermal stability. The flat-top design with ~-3.0 cc dish provides optimal squish and combustion chamber compatibility for high output setups without detonation risk (when tuned properly).

The SC7015-4 set is fully CNC machined, balanced to tight tolerances (±1 gram), and includes wrist pins and pinned fittings for ease of installation. Radiused valve reliefs accommodate high lift camshafts, and unique features like accumulator grooves, dual pin oilers, and pick-lock grooves ensure that ring sealing and lubrication aren't compromised under load. Ideal for racers or enthusiasts building either naturally aspirated or forced induction B-series motors seeking reliable performance.