If your car is 2004 and up it does not have a u-bend. 03 and under, I believe that you will still need the u-bend delete, but ask TDC for sure. I think that if you order the dp with a 02 sensor bung, it does take away from the need of a u-bend delete... but check again with some of the others for sure. Mine is a 04 gtp so didn't have to worry.