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View Full Version : Will I be the first GXP with long tube headers?


99-LS1-SS
03-12-2009, 10:30 AM
I'm installing my ARH headers this weekend. I was wondering if anyone else had put header on a GXP yet? My only concern is the mufflers bolting up to the x-pipe. When I bought them they were sure if they would bolt right up because no one had done it yet. I can't imaging the bolt pattern/angle being different but you never know. The mufflers are different on the GXP than the one's on the GT. I'm crossing my fingers.

If anyone has any experience with the GXP and long tube headers let me know. Thanks.
r33pwrd
03-12-2009, 11:39 AM
there is a GXP up here with Kooks on it (I believe they are Kooks) I can see if I can find the guys number... I invited him to come on here but have not seen him.
99-LS1-SS
03-12-2009, 11:55 AM
Cool! Thanks r33pwrd. That would be helpful.
PantherGTBlack
03-12-2009, 12:06 PM
It would be coooler if you did, maaan.
r33pwrd
03-12-2009, 12:14 PM
I can delete my post if you like :) I met the guy one day at lunch and his car still had the dealer places and already had a tune and headers
99-LS1-SS
03-12-2009, 12:20 PM
Did he happen to discuss any fitment issues?
R.Penguin
03-12-2009, 12:39 PM
Did he happen to discuss any fitment issues?
Speaking of fitment issues, are you still sleeping in the GXP? :rofl:
99-LS1-SS
03-12-2009, 12:43 PM
No, I've progressed to sleeping beside it.
r33pwrd
03-12-2009, 12:44 PM
Did he happen to discuss any fitment issues?

I really didnt ask him... I asked him how he liked the car and that was about it... I was pulling in and he was leaving so didnt talk much.
R.Penguin
03-12-2009, 01:18 PM
No, I've progressed to sleeping beside it.
Good thing your'e down South. Still in the 20F area at night here.:windy:
99-LS1-SS
03-13-2009, 02:20 AM
Looks like I might be able to swing a baseline dyno run tonight. It all hinges on me being able to leave work early. I'll video the dyno and take pics of the header install
Mike P
03-13-2009, 05:45 AM
Looks like I might be able to swing a baseline dyno run tonight. It all hinges on me being able to leave work early. I'll video the dyno and take pics of the header install


That would be cool! That 6.2 liter is a bad@ss engine! :)


...
GT G8
03-13-2009, 10:56 AM
Just curious......do things like Intakes, Cams, Headers and Exhaust for the G8 GT also fit the GXP?
99-LS1-SS
03-13-2009, 11:18 AM
I'm pretty sure they do. I'll find out for sure tomorrow morning...

The only thing I'm concerned about is the axle back flange on the stock mufflers hooking up with the x-pipe of the headers.
norm8332
03-13-2009, 11:27 AM
The only thing I'm concerned about is the axle back flange on the stock mufflers hooking up with the x-pipe of the headers.

I'm concerned too because I Might get those (GXP) axle backs.
GRRRR8
03-13-2009, 11:27 AM
I'm pretty sure they do. I'll find out for sure tomorrow morning...

The only thing I'm concerned about is the axle back flange on the stock mufflers hooking up with the x-pipe of the headers.

It should be the same from the pics I have seen of GXP muffs.
flomofo
03-13-2009, 08:35 PM
so gxp mufflers are just a little louder but no better flow right?
Crazy Paul
03-14-2009, 03:04 PM
Have a look and make sure the clutch fluid line from master to slave is a good distance away from your new headers.

Refer to this thread if you didn't see it: http://www.forum.grrrr8.net/showthread.php?t=4447&highlight=clutch
99-LS1-SS
03-14-2009, 03:06 PM
Everything seemed to be fine. I'll post up pics of the stock GXP exhaust later. I think it is a good deal different.