Re: Disc Brakes
Thought I'd chip in here - the basic problem is the the GTV discs are too small for the car, hence warping is a real problem, especially with drilled discs. Drilled are the worse for warping. Its common news in the Scooby community as well, drilled discs are a no-no.
I went for Nitrac grooved discs in the end - they are cryo treated to resist the warping and have been excellent on my GTV with Red Stuff pads. They get a fair bit of abuse as well.
It doesn't matter what the deal is with your discs, if they have warped they are technically not fit for purpose so you are entitled to your money back. Dont take no for an answer.