Manley Single Piston with Rings / 79mm Stroke 99.50mm Bore | 2004-2021 Subaru WRX STI (612000CB-1)

EJ25 Platinum Series Lightweight Piston

Manley pistons are machined of high-strength 2618 material. Each design is lightweight yet robust enough to deliver long service life. Offset wrist pin design is utilized for quiet start-ups. Perfect ring groove to skirt squareness is achieved through our unique “one fixturing” manufacturing method that assures maximum horsepower. All pistons come with moly coated skirts. Round wire locks, premium chrome moly wrist pins, and premium steel top ring sets from Total Seal are included with every kit at no additional charge. 9310 alloy upgraded wrist pins are available. Recommended clearance: .003″ for mildly boosted and .0035″ for highly boosted measured .850″ (79/83mm Strokes) and 1.100″ (75mm Stroke) from the bottom of the oil ring groove.

Manley Subaru EJ257 pistons now include Napier style second rings and higher tension oil rings (by Total Seal) for superior oil control.

Specifications

• Bore: 99.50mm Grade B
• Oversize: STD
• Rod Length: 5.137″
• Stroke: 79mm
• Comp. Distance: 1.209″
• Dome Volume: -22cc
• Cylinder Head: 51cc
• Comp. Ratio: 8.5
• Piston Type: Dish
• Piston Weight: 395g
• Included Ring Set: 46995DT-1

Applications

• 2004-2021 Subaru WRX STI
• Subaru EJ257

What’s In The Box?

• 1 – Piston w/ Rings

Warranty

• Manufacturer Standard Warranty