EBC DP5680NDX 04-06 Audi TT Quattro 3.2 Bluestuff Rear Brake PadsEBC DP5680NDX 04 06 Audi TT Quattro 3. 2 Bluestuff Rear Brake Pads Product Information The BlueStuff NDX race formula is an ultra high friction race pad with a friction level peaking above 0. 6 under braking, which will generate more G force than most pads out there if not all. BlueStuff is capable of street use as it bites well from cold. The big advantage of this pad is that it is one of the world? s first and only out of the box pre bedded race