New OEM RA Shortblock W- Forged CP Hybrid Pistons 99.5 Wire In ECU's logic expressions and CAN keypad

logic expressions and CAN keypad functions

2015 Subaru WRX Premium 2

Symmetrical 4-1 design maintains consistent and high velocity exhaust gas flow as RPMs rise

Smaller design = weight reduction throughout the entire valvetrain system

Balanced end-to-end

New OEM RA Shortblock W- Forged CP Hybrid Pistons 99.5 Wire In ECU's logic expressions and CAN keypadOutfront 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+