Manley 632202C-4 Turbo Tuff Piston Set 99.75mm Bore 8.5:1 Compression Subaru EJ257

The Manley 632202C-4 is a complete piston kit set designed for 2004 and newer Subaru WRX and STI models with the EJ257 engine. These pistons are machined from high strength 2618 material, featuring a lightweight design that's robust enough to deliver long service life. This set features a 99.75mm bore size (+.25mm oversize) with an 8.5:1 compression ratio and a 22cc dish design.

Turbo Tuff Series Features:

• Incorporates proven design enhancements from Manley's "Formula-Won" piston forging to withstand the rigors of the highest boosted and stressed applications
• Made from 2618 alloy with offset wrist pin design and moly skirt coating
• Perfect ring groove to skirt squareness achieved through unique "one fixturing" manufacturing method that assures maximum horsepower
• Includes Napier style second rings and higher tension oil rings by Total Seal for superior oil control
• Round wire locks, tool steel wrist pins, and complete ring sets included

Specifications:

• Bore Size: 99.75mm (+.25mm oversize)
• Compression Ratio: 8.5:1
• Dish Volume: -22cc
• Rod Length: 5.137"
• Compression Distance: 1.209"
• Standard 79mm stroke for 2.5L EJ257 engines
• Piston Weight: 408 grams
• Wrist Pin: .180" wall premium chrome moly

Recommended piston clearance is .003" for mildly boosted applications and .0035" for highly boosted applications, measured .850" from the bottom of the oil ring groove. Each complete kit includes four pistons, wrist pins, ring sets, and round wire locks for a complete installation.