[bluebeemer]

Been wanting to free up my exhaust for a year but no easy answer. I would love to go with high flow cats but seems no one can guarantee no CEL. So you have to deal with it somehow. DP fix is supposed to only be used to pass inspection or AFR eventually goes wonky per the mfr. Don't know that sensor spacers will do long term (?). Don't know if i can delete CEL and use my dinan stage 3 tune. Mine is a daily driver so reliability and drivability are top priority. There is a very expensive cat mfr mfr (european?) that makes the best high flow cat but not for N54. Wish for a better answer for those of us with similar goals/priorities......