chiefcey

I am installing a set of Kooks Long Tube Headers and an a catted X pipe(it hasO2 sensor extentions), will I need a retune?

acstone7

i dont believe you necessarily need a new tune, but after forking out 1200+, i would update the tune to get the most out of your purchase

white07

After I Installed me long tubes and o/r x-pipe I didnt tune my car right away and it ran fine. I really didnt feel any diffrence until after the tune.

tonkpils555666sas

The seems like it helps after putting long tubes. It isnt needed (as in your car wont break or anything...), but I would still update your tune... SCT THR Race tune? you notice a good difference after you first tuned your car? I use SCT also just with a B am a tune.

Grabber07Orange

no

sevenleaf

I have the same kooks headers, kooks o/r xpipe that brenspeed has on their website. They said LT's do NOT need a tune to run correctly unless you need the o2 sensors shutoff. They don't change tunes for LT's so I say no. I also called JDM who verified they don't change tunes for LT's.

chiefcey

Thanks everyone for your help, I spent the day over at Texas Hot Rods and I discovered that the retune after the LT Headers is not required unless the new exhaust isn't catted. However, you will see some gains by getting a retune. BLUF: I'm getting a retune after install, i mean why not after all I spent on the exhaust.
Thabks Again!

06Saleen3V

The car wont break or anything? sounds intelligent...Anyways to answer the OP's question, a tune is not required but is recommended. It will be running slightly more lean (not anything dangerous, but more lean than before).

chiefcey

ok, thanks again everyone, I will complete the LT upgrade and post you info on the difference before and after the tune.