I have a procharger on my G now. I'm picking up some APS test pipes so my question is do I have to get re-tuned when I get the test pipes installed?

 

yes.

 

It really depends on how lean you are now? I swapped OEM cats for test pipes on a TT car and my AFRs were Still fine, but if you don't have a wideband you won't know until you take it to a tuner. It is something I wouldn't take a chance on anyway.

 

Thanks for the input guys. Right now on my wideband I'm running 14.5.

 

That is a cruising, what is it at WOT?

 

Cruising

 

That is when it matters the least, WOT is when you want to watch to make sure things don't go lean.