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Outfront Motorsports Stage 1 RA shortblock is for that added Protection against ring land failure on a lightly modified car. These custom pistons are made specifically for use with the D25 cylinder heads found on the 06-14 WRX and other EJ255 applications.

This configuration includes:

  • Custom Outfront Motorsports spec EJ255 CP piston set (24cc) for D25 Heads
  • New OEM STI black Nitrited 2017+ crankshaft
  • New OEM STI connecting rods
  • New OEM rod and main bearings
  • New OEM Case Bolts
  • All wrapped in a new OEM case.
  • Rear Covers, Rear Seal, and Pin Plugs Included!!!

This block is rated at 500 BHP

New OEM RA Shortblock W/ Forged CP EJ255 Pistons 99.5

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