RCM EJ20 Block Guard Inserts (Pair)

Subaru EJ20 Billet Block Guards – Pair A pair of precision-machined Subaru EJ20 block guards, designed to provide additional support around the cylinder bores of the EJ20 open-deck engine block. The EJ20's open-deck design leaves the upper section of the cylinder liners relatively unsupported. On engines operating at increased boost and cylinder pressures, additional bore support can be beneficial when building an engine for higher-performance applications. These aluminium block guards are machined specifically to follow the shape of the EJ20 block and fit around the cylinder bores, helping to support and stabilise the upper cylinder walls while retaining the necessary coolant passages. Features Designed specifically for Subaru EJ20 engine blocks Precision CNC-machined aluminium construction Provides additional support around the upper cylinder bores Helps reduce cylinder wall movement under increased cylinder pressure Machined coolant passages maintain coolant circulation around the cylinders Ideal for performance, competition and high-boost EJ20 engine builds Supplied as a matched pair – one guard for each block half Professional machining and installation required Application Suitable for compatible Subaru EJ20 open-deck engine blocks. Because of the machining and tolerances involved, these guards should be installed by an experienced engine machine shop. Final machining, clearances and bore geometry should be checked as part of the engine build process.