Manley 615010CE-4 Forged Piston Kit 98+ Subaru WRX EJ205/STI EJ257 93mm Bore 8.5:1 CR

The Manley 615010CE-4 forged piston kit is engineered for 1998 and newer Subaru WRX EJ205 and STI EJ257 engines requiring a performance rebuild with increased displacement. This complete set features +1mm oversize pistons with a 93mm bore diameter and 8.5:1 compression ratio, making it ideal for turbocharged applications where lower compression is required to safely handle boost.

Key Specifications:

• Bore Size: 93mm (+1mm oversize from stock 92mm)
• Compression Ratio: 8.5:1
• Dish-style piston design for forced induction applications
• Forged aluminum construction for superior strength and durability
• Complete set includes rings for all four cylinders
• Compatible with Subaru EJ205 and EJ257 engines (1998+)

What's Included:

• Four forged pistons
• Complete piston ring set
• Wrist pins and locks

Manley Performance pistons are precision-machined from aerospace-grade aluminum forgings and designed to withstand the extreme pressures of high-performance and racing applications. The dished design lowers compression for turbocharged builds, while the forged construction provides exceptional strength-to-weight ratio and thermal stability. These pistons require cylinder boring to 93mm and professional installation.