That's seriously beyond amazingly lucky. Getting rid of the cats alone should throw a code. People are getting codes for itty bitty vaccum leaks. You've swapped out the entire exhaust system including LT headers and your ECM doesn't even notice? You should play the lottery with that luck.
***edit*** you said headers and off road pipe not full exhaust... my mistake. You should still see a code though.
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Originally Posted by 1badrwd
I must have gotten one heck of a system then because I put long tube headers with a off road pipe on and I have not thrown any codes! Put about 100 miles on it so far with no issues at all. Still getting it tuned but have a couple week wait for an opening.
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2016 Black 1SS w/ MRC, low-gloss black wheels, auto trans. Self-created custom Dark Knight Edition accents. Rotofab CAI with dry filter and sound tube delete, PRAY ported intake manifold and throttle body, Texas Speed cam, Stainless Works headers and exhaust, Skid Mark garage E85 kit, JMS fuel pump voltage booster, Circle D torque converter. Custom E85/mod tune by Jannetty Racing.
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