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Bearing Type: Ball Bearing
There are many important reasons to use ARP main stud kits on your Evo 4g63
reliable mounting solution without clearance issues near the engine block
They offer higher clamping force
Performance & Reliability
Manley Pistons 99.50mm STD Bore 9.8:1 Dish Extreme Duty Subaru WRX / STI EJ257 Vehicle Model_Genesis Coupe Bearing Type: Ball BearingPart #: 632300CE 4 The best aftermarket Subaru piston company just got even better with our new Turbo Tuff lineup targeted specifically for EJ25 engines. By incorporating proven design enhancements from our "Formula Won" piston forging, we've created the ultimate Subi piston to withstand the rigors of the highest boosted and stressed applications yet still run "quietly" and trouble free for the daily driver. Like all Manley Subaru pistons, these are