Quote Originally Posted by rickisrad View Post
LOL, I wonder the same thing. GTPpower must have had a traumatic experience installing them or something. I can't seem to locate it now but I have seen before and after dyno and it shows improvement with flow testing, especially with supporting mods.
To answer the original question. They will fit but like said above, you get what you pay for. The Ebay headers can and probably will require some modifications for fitment issues and sealing.
Not any experience other than we've both been around for awhile and we can tell you unless you're dropping a grand on 3800 headers, they're gonna have issues.

Now I had Pacesetters...and welded them all up...had solid mounts all around with the flex totally removed and they were great. The crossover, rear header, and downpipe were all once piece as well.

They do show gains; however until you dive into the valvetrain, a PLOG/DP or just a downpipe will suffice. Hell I had a 3.3" with a GenV on a stock valvetrain car that just had injectors and E85 in it. Ran like a raped ape.

The exhaust doesn't need to be 3". The factory catback flows fine up north of 300~WHP, easy. That's cam/intercooler territory.

Glowing manifolds; if the converter has been replaced, sounds like a timing issue. I bet it runs like junk.