I was under the car last night and noticed my extra capacity sump is rubbing on the LICP, there is about a half inch gap and the motor must be torquing up against the LICP so I'm still on stock engine mounts and was thinking I might put a front hardrace mount on. Hardrace are hardened rubber compared to poly and I cant find anywhere comparing vibration but anyway my question is that will a harder engine mount transfer more stress to my 6 speed gearbox and cause more load on the 4th to 6th gear on acceleration? I do track the car and am mindful of over 420hp going into the higher gears.

 

No probs using a Hardrace front & a new std gsr full circle gearbox bush. Put full circle rear diff bushes.