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Can I get away with using a 2.5 inch bore when trying to achieve 370ish bhp?? Setup will be 255 fuel pump, hks headers, 2.5 full decat, apexi power fc, andy forest tdo5 20g, 88 front mount, 550 denso injectors. Thanks in advance and happy new year.
Im sure ive read that AndyF is making some 450bhp on a 2.5" exhaust system. This is I believe is on a Spec C car he has. Someone is bound to correct me if I made an error.