[patton16]

I have a 2006 gtp g6 auto sedan with gtr exhaust along with K&N intake. I was wondering whats the next mods i can do for hp gains and how much do they cost. (ive heard of tunes????),
thanks

 

[V6G6]

im in the same boat as you. i was lookin at new headers on ebay. btw does your k&n intake make an odd noise kinda like a whistle

 

[patton16]

yes, but the whistle is normal

 

[oomonte]

vectormotorsports has a popular tune that alot of g6's have...