Manley 04+ Subaru WRX/STI EH257 99.50mm STD (Grade A) Bore 8.5:1 Dish Piston (SINGLE PISTON) - 632200CA-1

The best aftermarket Subaru piston company just got even better with our new Turbo Tuff lineup targeted specifically for EJ25 engines. By incorporating proven design enhancements from our Formula-Won piston forging, we've created the ultimate Subi piston to withstand the rigors of the highest boosted and stressed applications yet still run quietly and trouble-free for the daily driver. Like all Manley Subaru pistons, these are made from 2618 alloy, utilize an offset wrist pin design, are skirt coated and include our standard 2.500 x .180 wall premium chrome moly wrist pin (P/N 42346). 9310 alloy .250 wall pin upgrades are available. Simply order the EXTREME DUTY part number in the column below. These come equipped with the 9310 pins (P/N 42547). 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. 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 (79mm STD Stroke 2.5L):

• Bore Size (mm): 99.5 Grade A
• Over Size: STD
• Rod Length: 5.137
• Comp. Distance: 1.209
• Dome Volume (cc): -22
• Cylinder Head (cc): 51
• Comp. Ratio: 8.5
• Piston Type: Dish
• Pistons Wt / Gms: 405
• Premium Steel Top Rings: 46995DT-1

• Subaru WRX STi 2004 Up

• These pistons feature skirt diameters that correspond to the OEM Grade A or B bores resulting in a piston to wall clearance range of .0023 - .0031. Check the bore grades on the top of your block and order the appropriate quantities of Grade A or B pistons. (Sold as -1 individual pieces, not sets.)