Powerchip for EF XR8
i was just wondering if any of you guys have used the Powerchip on an EF XR8.
If heard that chip torque and uni chip are good too, and would like to know if anybody has used any of them, and how much are they fitted. Also, if i put one in my car, then do head work later, can the chip be reprogrammed or do i need a new chip ???
Thanks for you help