I agree with the guys at Concept Z. When I originally purchased this over 6 years ago, I did not see OR there was no mention of this potentially not cooling as well as the fan clutch, engine-driven fan. I ended up throwing the $190 fan and shroud in the trash because my car kept overheating and boiling the radiator. This was no matter how hard I tried to make it work. IF you chose to use this on a TT, ONLY use it to replace the e-fan. KEEP the belt-driven fan.