Manley Performance Platinum Series 79mm STD Stroke (2.5L) Piston Set - 99.55mm Bore w/8.5:1 Compression Ratio | 2004-2021 Subaru WRX / STI (612001C-4)

Platinum Series Piston Set w/ 8.5:1 Compression Ratio & 99.55mm Bore Size for EJ257

Manley's signature “Platinum Series” pistons feature 2618 alloy forgings, proven cam and barrel skirt profiles, tool steel wrist pins, and moly skirt coatings on select part numbers. Join the ranks of professional engine builders and tuners who rely on Manley pistons for superior performance and durability. Premium Chrome Moly wrist pins come standard with these pistons. Manley’s unique fixturing allows for skirt turning and ring groove machining in a single operation, ensuring ultimate ring groove to skirt squareness.

Measurements

• Bore Size: 99.55mm
• Oversize: .05mm
• Rod Length: 5.137”
• Stroke: 1.209”mm
• Comp Distance: -22
• Dome Volume: 51cc
• Comp Ratio: 8.5:1
• Piston Type: Dish
• Piston Weight: 395g
• Associated Ring Set P/N: 46995DT

Please Note: The photo on this listing is generic and may not reflect the exact product you will receive, please refer to measurements listed above to ensure fitment or consult your build advisor.

Applications

• 2004-2021 Subaru WRX / STI
• Engine(s): EJ257

What's In The Box?

• 4 - Piston(s)
• Piston Wrist Pins & Rings Included

Warranty

• Limited Manufacturers Warranty