Manley Performance 04+ Subaru WRX/STI EH257 99.50mm STD (Grade B) Bore 8.5:1 Dish Piston

• Turbo Tuff Pistons
• Made from 2618 alloy, utilize an offset wrist pin design
• Deliver long service life
• Design enhancement from Formula-Won piston forging
• Premium steel top rings with Napier style second rings and higher tension oil rings for ultimate oil control are included with each set along with round wire locks. 
• 9310 Alloy .210" wall pin are included with the Extreme Duty Series
• 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.

Specifications

• Bore size : 99.5mm Grade B
• Over Size : STD
• Rod length : 5.137"
• Comp distance : 1.209"
• Dome volume : -22cc
• Cylinder Head : 51
• Dish Piston type
• Comp. Ratio : 8.5
• Piston wt/gms : 405
• Include ring set : 46995DT-1