the PG ,woody and I have the Phantom Grip with no problems ,,, mine is no longer in the car,, as for the limited rear, that will help in the 1/4 and backing it up with the PG is a great idea, or should I say don;t do it,, as the ecu will not work with the limited rear then you can sell it to me, ( i have heard the ecu thinks the tires are spinning too fast and start appling the brakes for you ,,you may have to always turn off your traction control,, again this is a pain in the a** so sell it to me. jim