I have a custom E46 ZHP lookin for increase hp-torque, car has over 140K. thinking of trying ls3 swap when current Iline 6 pukes. Don't want to swap an engine that runs thinkin of nitrous system that I can increase over summer of 13 to max out in fall and then do the ls3 swap. Anyone have luck with the wiz from over the pond and his nitrous systems???