SKU OUT-SB-S1R-H
 
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 S20 cylinder heads found on the 02-05 WRX and other EJ20 applications without cylinder head combustion chamber modification.

This configuration includes:
Custom Outfront Motorsports spec Hybrid CP piston set (25.5cc) for EJ20 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