CP Pistons SC7016-4 81.50mm 9.8:1 Compression Piston & Ring Set for 94-01 Acura

Vehicle Fitment

• 1994-2001 Acura Integra GS-R (B18C1, 1.8L DOHC 4-cylinder)
• Other Honda/Acura B-Series blocks using B16A/B18A/B18B/B18C heads (with compatible bore, stroke & gasket setups)

Fitment Notes

• Requires 81.50 mm bore - cylinder must be bored/honed if stock bore is smaller
• Uses ~48 cc combustion chambers plus ~1.2 mm head gasket to reach advertised compression
• Not compatible with performance trims beyond GS-R without verifying clearance for lift, valves, and head design

Features

• Forged aluminum alloy for high strength under extreme loads
• Flat top design with four valve reliefs
• Dedicated left/right forgings to improve balance and reduce wear
• Fully CNC machined, with tight tolerances and consistency
• Wrist pins included at no extra cost
• Accumulator grooves and double forced pin oilers for better lubrication
• Pick-lock grooves for secure lock retention
• Balanced to ±1 gram to ensure smooth operation at high RPMs

Specifications

• Bore Size: **81.50 mm** :contentReference[oaicite:0]{index=0}
• Stroke: **87.20 / ~89.00 mm** (depending on crank choice) :contentReference[oaicite:1]{index=1}
• Rod Length: **138 mm (approx.)** :contentReference[oaicite:2]{index=2}
• Compression Ratio (C/R): **9.8:1** :contentReference[oaicite:3]{index=3}
• Piston Type: Flat Top with four valve reliefs; ~-3.6 cc volume drop from flat top stock reference :contentReference[oaicite:4]{index=4}
• Compression Height: **1.181 in** (≈30.00 mm) :contentReference[oaicite:5]{index=5}
• Piston Material: **Forged 2618 aluminum** :contentReference[oaicite:6]{index=6}
• Piston Ring Sizes: 1.0 / 1.2 / 2.8 mm (top / second / oil ring) :contentReference[oaicite:7]{index=7}
• Wrist Pin Size: **21 mm** :contentReference[oaicite:8]{index=8}
• Advertised Set Weight: ~279 grams per piston (set) :contentReference[oaicite:9]{index=9}

Included Components

• 4x CP SC7016-4 forged pistons
• 4x complete ring sets
• 4x wrist pins (21 mm)
• 4x circlips / pin locks

Product Description

The CP Pistons SC7016-4 is a high-performance piston and ring set engineered for B-Series Honda/Acura builds, especially the 1994-2001 Integra GS-R (B18C1) platform. With an **81.50 mm bore**, forged 2618 aluminum construction, flat-top design and four valve reliefs, this kit delivers a 9.8:1 compression ratio when used with ~48 cc heads and ~1.2 mm head gasket. The set includes wrist pins and rings, and is balanced to ±1 gram to maintain smooth operation at elevated RPMs.

This kit is ideal for engine builders seeking reliable NA or mild forced induction performance from the B-Series block with minimal internal modification. Bore and head compatibility must be confirmed - particularly piston-to-valve clearance, head gasket thickness, and ensuring proper deck height. 2025 fitment is *unconfirmed*, as all verified listings cover up through the 1994-2001 model years and compatible engines/transplants.