Great video. Mine made 280-290hp stock. 350ish full exhaust. 420ish 223/231 cam. (On the same dyno) Not sure what to make of the headers as my KOOKS headers look different. Quality of mine is ample better. Had KOOKS on four of my cars and they never looked like yours. Hope KOOKS is not going downhill....
Im jealous of the room there is to do headers. You can reach bolts from the top or bottom. Gotta pull the motor or drop the k member with a 4.6 4v, it wasnt fun.
I have a G8 and that starting HP had me scratching my head with the title saying just G8. Then I saw that tail lights and said okay GT line, that horsepower now makes more sense then. Still wish I can just drive a GXP model at least one time. That LS3 V8 engine YES.
Joe, after hearing what you were saying about the headers from Kooks, what headers would you recommend ? I have a stock 2009 Pontiac G8GT (Red), that I bought new in 2009, thanks 🙏🏼
I got this same package but with pype long tubes instead, it’s called the wake your neighbor package from g8 only.com lol I’m surprised the kooks are that jankie, my cheep pypes headers are much better quality surprisingly
What about just putting some shorty headers on with stock exhaust...more horsepower would be nice but I just want a very slight bit more rumble when accelerating (I am old too)
I'll be keeping the mach shorty on mine if I ever do headers haha. These cars do have a good amount of sound deadening, swapping cars with a friend for a drive through town and following mine made me realize how loud it is even with the mach on it and stock manifolds/cats.
Hello there sir , is there any possible way of guessing the length of that stock center muffler? I have a Dual in dual out magnaflow muffler 18"Length × 5" hight × 8" width. I really want to add it so I can do rear muffler delete and I want to be sure it's a close enough fit.
Awesome video 👍🏻 How much degrees did you add to the timing? Did you add timing after 2000 rpm ? Or on whole table? Thanks a lot , nice and informative. Good luck
You had a choice of 3 Solo exhausts. Mach, Mach shorty, and you picked Street Race the one without a muffler. You picked the lowest cost and the loudest one. Should have picked the Mach. Sounds better and roars at WOT, but is almost stock quiet at highway cruise.