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Ball bearing with 4-bolt flange
When compared to a traditional head bolt a smaller portion of the fastener torque is wasted in friction and fastener twist so more force can be applied toward sealing the head gasket
Max Boost = 35psi / 40psi
Forester STI MY04-07 (6MT TY856)
OEM Type RA EJ25 2.5L Subaru STi Shortblock Timed & Dressed Packages:OEM - EJ257 STi - Single AVCS +($2300.00) Ball bearing with 4-bolt flangeOEM Factory Shortblock ('18 '21 STi Type RA) This Block is the same casting as the latest engines, numbered "705." The crankshaft is the same nitrided, full counterweight design found in previous EJ25s. The bearings and clearances thus far have been within typical late model EJ257 specs as well. Select a options in the drop down menus to build a fully optioned Longblock built to your specs! Specifications Suggested Max Power: 450hp Block Type: Semi
