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The stock motor mounts are very soft and can fail at higher than stock power levels
2011 Subaru Impreza WRX STI 2
both which can lead to premature bearing or crankshaft wear
Each breather cap has two 3/8 NPT holes for fittings
King Performance XPG Main Bearings Thrust #5 .026 FA20DIT WRX Shortblocks The stock motor mounts areThese bearings are specifically engineered to solve premature bearing failure caused by low oil pressure or oil starvation that has plagued the high output Subaru EJ series boxer engines. To improve oil flow, oil slots on the King XPG bearings are replaced with oil holes for better oil distribution in the groove and more consistent oil flow. Fully grooved number three main bearings enable 360 oiling to number two and number three rod bearings. King