I had an off road h pipe and took it off and put in a high flow cat h pipe. I want to know if i can use the same tune for the catted h piped that i had for the off road h pipe?
Most people on here will tell you to re-tune to it...I personally think you are ok to run the current tune.
Are your rear O2s turned off in the current tune? U can keep them turned off it won't hurt anything but you could get them turned back on since you have cats now...
From what I've seen having the rear sensors off is the only difference. Even with the high flow cats you may still need them turned off since it can still trigger a cat underefficiency code.
My opinion is unless you are in an area that tests for emissions, just stick with your current tune and don't give it a second thought.
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