The G8 is really nice and for four doors really peppy, but can't hold the Goat down. My goat has had lt headers, full exhaust, full intake and a 150 shot of the good stuff. it makes 376 at the wheels on a nitrous tune without the spray and 499.3 on nitrous. All thru a T56 tranny with a twin disc clutch on drag radials. The G8 is in no way a factory a slouch though.