Mahle MS PowerPak Forged Pistons Subaru WRX EJ255 99.50mm STD Bore -14.1 cc 9.6:1


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The Mahle PowerPak is a complete, race proven piston assembly kit.
It is composed of hand deburred, forged, performance coated pistons, high quality steel pins, round wire locks and low drag performance file fit rings.

Performance coatings include a phosphate dry lubricant that is used to protect against ring micro-welding and pin galling during initial startup and break in. For added performance, MAHLE applies its proprietary Grafel anti-friction coating to each piston skirt.


More Information
Item Weight 410.8 g
Shipping Weight (Dimensional) 6.170000
Clearance Sale No
Availability Discontinued
Part Type Pistons
Make Subaru
Vehicle Model Impreza WRX
Model WRX 06-07 GD, WRX 06-07 GG, WRX 08-14 GR
Engine EJ255
Rod Length 5.137" / 130.5mm
Rod Length Oversize Standard Length
Bore Diameter 99.5mm
Bore Oversize Standard Bore
Stroke 79mm (Standard Stroke)
Compatible with Stock Sleeves Yes
Requires Aftermarket Sleeves No
Compression Ratio 9.6:1
Compression Ratio Range 9.0:1 - 10.0:1
Pin Size 0.905" / 23mm
Head cc 50 cc
Face Type Dish
Dome cc -14.1 cc
Compression Height 1.208" / 30.7mm
Piston Coating Skirt Coating
Skirt Type Slipper Skirt
Piston Material 4032
Carb Legal Unspecified
Wrist Pin Wall Thickness 0.187"
Wrist Pin Dimensions .905" x 2.260" x .187"


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