I heard about 6651 via a few recommendations . Saw their work on a handful of cars and decided to give them a shot . The issue I had was that I installed a new header with too large of flange to connect to my Oem catalytic converter . Ryan informed me that it was a fairly easy job to just add a larger inlet / flange to the catalytic converter . $80 and half an hour later and my car was good to go . Being so picky I asked to see the work before they finished and I was highly impressed . No leaks , clean welds , and they were nice enough to clear the check engine light that had came on from me driving the car over there without the O2 sensor plugged in . I plan on having them powdercoat my rims a different color in the near future . Highly recommend them for anyone looking for anything custom .