I honestly wasn't a fan of the Phantom Grip. I drove three minis, almost back to back at an autocross. One stock, one with a phantom grip, and one with a Quaife... Where the stock and quaife equipped cars were fairly easy to drive through a corner (albeit, the stock one had considerable wheel spin), the Phantom equipped car was harder to keep on line. You could actually feel the difference in the car when the Diff LOCKED... It would either start plowing, or it would suddenly pull further into the corner. Definitely not as predictable as a Quaife.

Dan