Hi guys & girls, I have an 05 Whippled GT with Kooks LT headers and Catted H pipe. I want to switch to and off-road H pipe and was wondering if there is any reason I can't just switch out the H pipes. In other words, will I "need" a re-tune? I understand to benefit from a catless h pipe I will need a tune but will running a catless pipe with a tune for cats be a problem for a few months till I can afford a re-tune?

 

Your car will trip codes if you remove the cats. Get a re tune and add a little extra power.

 

If your tuner has the capability, you can turn off the secondary 02 sensors and avoid the MIL. Also how much does your tuner charge to email you a tune (unless your going to a local tuner)

 

Being FI, you will be removing a restriction and you should re-tune, FI is very sensitive to flow you.

 

I have a tune now with the rear 02's off due to code P0430 so this is not an issue. I was wondering in the sense of how the car will run with the cats being removed.

 

I use a local tuner guy. He's great but it's probably $200 for another tune and I was hoping to skate by for a bit. My rear 02's are off in my current tune so codes won't be an issue.

 

Where did you buy your Whipple from? What type of tuner do you have and where was this purchased?

Depending on the vendor maybe you can get a new tune emailed to you?

I think most people know that American Muscle, Brenspeed and JDM do lots of email tunes......so if you bought any of the above from these vendors.....perhaps they can do something for you.

 

I got the tune and Whipple from lethal performance. The tune I got was not perfect, the idle was wrong. Took it to a very well known tuner for a dyno tune. Guess I'll just bite the bullet and dyno it again.