JE FSR Forged Pistons Subaru WRX EJ255 99.5mm STD -7 cc 10.3:1

Back Ordered

This item is out of stock at the manufacturer level, and experiencing a known global supply delay. Contact us for the latest availability date estimation.



  • Time Attack FSR Pistons now available!
  • 2618 T6 high tensile forged aluminum
  • JE designs are specifically engineered for extreme applications up to, and including, professional competition. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy.
  • Dome and dishes feature smooth flowing radii for excellent flame travel.
  • 1.2 x 1.2 x 2.5mm ring widths.
  • .905 x 2.250 straight wall carbon steel wrist pin provided.
  • Pin fitting and Tru Arc locks included
  • Rings Now Included
NOTE: Standard Stroke Series now compatible with either OEM or aftermarket rods!


More Information
Item Weight 423 g
Shipping Weight (Dimensional) 5.850000
Clearance Sale No
Availability Back Ordered
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 10.3:1
Compression Ratio Range 10.0:1 - 11.0:1
Pin Size 0.905" / 23mm
Included Ring Set JG4904-3917
Included Pin 905-2250-18-51S
Head cc 51 cc
Dome cc -7 cc
Compression Height 1.209" / 30.7mm
Piston Coating Skirt Coating
Brand JE Pistons
Skirt Type Slipper Skirt
Piston Material 2618
Carb Legal Unspecified
Wrist Pin Wall Thickness 0.180"
Wrist Pin Dimensions .905" x 2.250" x .180"
Pin Material 5115 Steel
Shipping Label Free Shipping


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