i wouldn't worry too much about bhp MURPHY, its torque that counts on road. again, theres no cheap way to improve on that, best is to fit a schrik. however, the vr6 has really poor gear ratio's for accelaration, so if you want to lower the 0-60 you may wanna look there first. i believe a change of final drive ratios has a huge effect, a lsd or atb is also a very good addition to help traction.