TJH416

Ive done some searching but I havent found a clear answer to this so far....

I currently have the Renntech shorty headers with ECU upgrade. I am looking to switch out to long tube headers and remove cats. Question is, would this require a full re-tune? I know going from stock to LTH does, but I am not sure about this specific situation. I also have the Mikes h-pipe but I dont think this affects the question.

Any input is appreciated, thanks!

AKnight55

I may be interested in the shortys, When you take them off.

deadlyvt

Yep
You are going from catted to catless which needs a tune. The shorty to long tubes probably wouldn’t really need it to be honest but to maximize it you would want to.

TJH416

Thanks! This is what I assumed but I just wanted to confirm.

TJH416

Not sure I will go this route yet, depending on what a re-tune would cost. If I do I will definitely let you know!

AKnight55

Thanks!

hachiroku

any large change to your vehicles configuration will require a full retune if you are looking for absolute optimal performance. feel free to reach out if you're looking for a ground up custom tune for your setup and not a copy and pasted tune like the others.