Quote Originally Posted by acidrayne280 View Post
Hi all, i've been lurking here ever since I bought my 07 GXP a week or so ago. I'm trying to plan out the upgrades that I'm eventually gonna do to her and I have a few questions. First is about the exhaust. It's either headers OR a downpipe such as the DP7S or DP5S, right? Also, some people are saying that the DP7S with high flow cat is really not much of an improvement over stock, is this true?
Anything is better than GM factory exhaust, it's awful. To get the most out of the car, I'd say Doug Thorley Headers and whatever catback you want...problem is, HP per $. I'd venture to say you wouldn't see more than 15~WHP with headers and a catback on the LS4 car. They just need more intake/valvetrain mods to make the headers worthwhile. If you don't plan on getting into the motor (ie Cam & Heads), then I'd just get some mufflers of your choice, and a catted downpipe. I'd buy the downpipe from Hogan Performance however, it is the best LS4 unit on the market. I have seen Curt's stuff first hand...and it is top notch quality.

Quote Originally Posted by acidrayne280 View Post
Also, the shift kits...will doing one of these help prolong the life of my tranny, or would I be better off going with a kit such as the one below? I'm a little confused as to weather or not that is just a do it yourself TEP build

Dave @ Triple Edge Performance has great stuff as well, and his shift kits work great. If you are however wanting a more solid, performance feel...lean towards the Intense-Racing Shift Kit. Shift Kit just requires a pan drop, 7-8 quarts of new fluid, and a new trans filter. Which wouldn't hurt at all. Takes a hour or two, actually pretty simple broham.


Quote Originally Posted by acidrayne280 View Post
Finally, I know this last question might be in the wrong part of the forum, but as far as headlights go, are those SPYDER ones crap like I have heard? Would I be better off going with the HID upgrade? Thanks in advance guys
SPYDER headlights suck.

Keep the factory fog lights/headlight capsules...and just get HID's for them, probably 9006's...or 9007's...not sure. I buy all of my stuff from Best HID Kits, HID Headlights online shopping, LCD Projector/Tattoo Kits/CCTV Systems for sale

Never has left me down yet, minus the HID's I put in my sister's Accord...but I blame the source of the car for the issues, not VVME...damn Honda's. hah.

Otherwise...if I had just bought a GXP, I'd go about it like so...

DIY Intake System...ie, make your own.
Catted 3" Downpipe, Some sort of muffler with the stock tips re-used
Poly Upper Dog Bone Mount/Bushing
Shift Kit with the Pan Drop/Filter Change
...then, however you go about it...get that fugger tuned. You can buy HPTuners and do it yourself, or pay someone in NY to do it for you.