I hope you guys know that the GC kit is used for weight balancing. It has a linear spring rate and the ride is going to be very harsh. It is not your typical lowering kit, it was designed for autoXing, and roadcoarse. It being adjustable is a plus but i don't want to knock on you guys or anything, but if you're not going to use it to balance the weight of the car which is its whole intention for racing, go for the Eibach.
Then again its just my 2 cents.
