New OEM RA Shortblock W- Forged CP Hybrid Pistons 99.5 Wire In ECU's Added ground and 5V wires

Added ground and 5V wires spliced in with labels suggesting pin use

The main case breather is -12 and the others are all -8 AN

and turn up higher boost pressures

2015 Subaru WRX Premium 2

O2 Bung and Plug

New OEM RA Shortblock W- Forged CP Hybrid Pistons 99.5 Wire In ECU's Added ground and 5V wiresOutfront 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 Nitrite 2017+