CP Piston & Ring Set for Subaru EJ257 WRX STi - Bore (100mm) - Size (0.5mm) - CR (8.2) - SC7421-4
Upgrade your Subaru Impreza WRX STi (2004-2012) with the CP Piston & Ring Set. Designed for high performance, these pistons offer a perfect fit and enhanced durability.
- High-strength aluminum forgings
- Super lightweight for improved speed
- Precision CNC machined and balanced
- Includes wrist pins at no extra cost
- Accumulator groove for better oil control
- Double pin oilers for enhanced lubrication
- 100mm bore with 8.2 compression ratio
Whether you're racing a Honda, Acura, Mitsubishi, Toyota, Nissan, or Subaru, CP Pistons has specially designed high-performance pistons off-the-shelf. In most cases, these will directly replace the stock pistons. CP pistons are compatible with oversized valves and high lift camshafts. Part numbers ending in a "X" are on a X-style forging for additional strength, durability and weight reduction. The X-style has a full radius dome design, high-performance rings and lightweight wrist pins. CP Pistons represent the highest quality and is engineered for maximum power. Pistons can be ordered with gas ports, skirt coating, ceramic top coating, and stronger wrist pins if desired.
Features:
- High strength aluminum forgings
- Super lightweight designs
- Fully CNC machined and balanced to +/- 1 gram
- Wrist pins included at no extra cost
- Accumulator groove included
- Double pin oilers, force fed from oil ring
- Pick lock grooves for easy lock removal
- Bore 100mm
- Size (0.5mm)
- Compression Ratio (8.2)
- Subaru Impreza 2004-2012
- CP Pistons are priced and sold per piston. 4 Cylinder engines will require Quantity 4 of each part #.
- No Locks Supplied, use Factory Locks