SKU OUT-SB-S1R
 
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 B25, V25, W25, and N25 cylinder heads found on the 04+ STI and other EJ257 applications.

This configuration includes:
Custom Outfront Motorsports spec EJ257 CP piston set (22cc)
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