maxiwoofus

I used this for my 2005 Audi TT 3.2 DSG. I installed Magnaflow OEM replacement cats and could not get it to reset the ECM. I installed the restrictors and used the "small" restrictor as first recommended by the manufacturer (if they provided instructions it would be helpful) and after driving the car for 25 miles...all values were reset. The "C" clips are tight and I highly recommend having a tool (which I had) to install them. I tried without them and could not get to reset after 200 miles. The Audi dealer could not get to reset either. After we called private shops I was told of these restrictors and they do just what they say! Very pleased