Manley Pistons for the EJ257 motor in the 2006-2014 WRX and 2004+ STi models includes a full set of 4 pistons, wrist pins, ring sets and round wire locks.
See more Manley Pistons for the EJ257 WRX & STi.
Vehicle Fitment:
Subaru EJ257
2006-2014 WRX
2004-2021 STi
Piston Specs:
| Part Number: | 632801C‑4 |
| Pin: | Standard .180″ Wall |
| Bore Size: | 99.55mm (+.05) |
| Rod Length: | 5.137″ |
| Stroke: | 79mm Standard Stroke (2.5L) |
| Comp Distance: | 1.209″ |
| Dome Volume: | -17 cc |
| Cylinder Head cc: | 57 |
| Compression Ratio: | 8.5:1 |
| Piston Type: | Dish |
| Weight: | 419 Grams |
| Ring Set: | 46995DT‑4 |
Turbo Tuff Benefits:
• Thicker Skirt Wall
• Increased Corner Cross Sections
• Formula Won “Strutted” Forging
• Outboard Pin Bosses
• Offset wrist pin for quiet start-ups
Manley Platinum Series Pistons:
• Moly Coated Skirts
• 2618 high strength material
• Lightweight design with offset wrist pin for quiet start-ups
• Pressure balance groove
• Will accommodate +1mm valve sizes
• Premium Steel top rings with Napier second ring
• Higher tension oil rings for improved oil control
• Round wire locks included
• Recommended piston clearance: .003″ for mildly boosted and .0035″ for highly boosted
measured .850″ (79/83mm stroke) and 1.100″ (75mm stroke) from the bottom of the oil ring
Includes:
(4) Pistons
(4) Piston Ring Sets
(4) Wrist Pins
(4) Wire Locks
Images:
Pistons will vary slightly by application. Images are for reference.
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Returns
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