Originally Posted by mckeen723
Looking at getting headers and high flow cats soon (2011 L99 borla atak catback) leaning towards kooks long tubes.. Any of you members out there running headers and cats with out a tune?
As of yesterday, I am running coated Kooks 1-7/8" headers and cats (not the green ones) without a tune. I plan on getting a remote tune done in the next few days but, as of now; no CELs so far. However, based on everything I have read, a CEL is just a matter of time without a tune.
Running headers and cats without a tune will not hurt the car but 1) you won't get the full benefit of better exhaust flow without a tune and 2) you will eventually get a CEL and/or other codes.
Kooks 1-7/8 LTs; Calico coated w/HFCs, Solo Mach XL catback w/J-pipes, VMax TB, C.A.I. Intake, JRE Tune, RX Catch-Can