RCM500 2.1L Closed Deck Block Short Engine GruppeM but with aftermarket systems you

but with aftermarket systems you need an o2 sensor bung to plug one

These are available in both Standard (27-spline) AND Pro-Level LSD (28-spline) versions for use with DSS Pro-Level FWD B-Series axles

From among them

Price displayed is per APIO Tactical Seat Back Cover

RCM500 2.1L Closed Deck Block Short Engine GruppeM but with aftermarket systems youRCM500 2. 1L Closed Deck Block Short Engine. RCM pride themselves on supplying the ultimate range of custom built EJ Series short engines. We have built an enviable reputation of assembling high powered Subaru power units to a meticulous level of detail not seen in the tuning industry before. This level and depth of expertise is based on 30+ years of experience of working with the Subaru brand along with our Gobstopper race car program, whilst