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99 GP GT Headers - What's best?

M

mvp04nv

New member
Hello,
I am looking to install some headers for my 99 GP GT, but would like to find some headers I can use on the streets, and that will pass smog? I just basically want it to be street legal.
Any help or advice would be great

PS-car is stock, planning to install K&N intake, + cams so if any other advice would be gr8

Thanks
 


I've got the SLP set installed on my car and am pretty happy with it. Be aware that their flex pipe system is notorious on leaking, so you may want to replace that with a better quality one before the install. If you go with the combination Headers and Hi-Flow cat, you will probably have to upgrade or re-program your PCM so it will pass smog, not a big deal. Had my set on for a while now and have not had any problems passing N.Y. State smog. Be advised, I thought these were a real pain in the ass to install, but I'm sure any headers system for this vehicle is a pain. Don't know if anyone elsle wants to chime in.
 
You don't really need headers on a N/A 3.8. I would just go with a front powerlog and a 2.5" downpipe. You put too big of exhaust on your car you will lose low end torque, car will feel like a dog just cruising around. If you still wanted to get headers the SSAC off of ebay are a pretty affordable header and they have been put in a lot of cars lately with good results/ease install.
 
before you decide you should ask yourself this question. How far are you going to take your build?
 
99prixgt said:
before you decide you should ask yourself this question. How far are you going to take your build?
Click to expand...

yyaaaayyyyy

you dont need headers if youre staying n/a. if you want to go turbo then headers would be a waste of money. if youre planning on going blown then i see your point. what are you doing with your car?
 


Headers are a no go on a stock N/A GT. Get a custom intake and save your money on that K&N junk. Money you save on making your own you can buy a Front Powerlog and catted Downpipe so your car will pass emissions.
 
99prixgt said:
before you decide you should ask yourself this question. How far are you going to take your build?
Click to expand...

Well, I plan on adding headers, K&N intake, cams & perhaps a cartuning turbo kit.

That seems to be about it...for now

Turbo is definitely one of teh alst of my projects though seieng how expensive it is
 
bluegtp91 said:
Headers are a no go on a stock N/A GT. Get a custom intake and save your money on that K&N junk. Money you save on making your own you can buy a Front Powerlog and catted Downpipe so your car will pass emissions.
Click to expand...

I have heard something about the custom intakes on ebay being cheap knock offs since they have smaller diameters or something...but anyway, what is a front powerlog & where can I get one of those?
 
Bio248 said:
you dont need headers if youre staying n/a. if you want to go turbo then headers would be a waste of money. if youre planning on going blown then i see your point. what are you doing with your car?
Click to expand...

Y is headers a waste on turbo?
but anyway I dont plan on adding turbo for awhile so headers, intake, cams, would be options now.
 
headers would be a waste of money. Most vendor turbo kits only bolt up to stock manifolds, and the stock ones are stronger, The zzp kit you need a different rear manifold. If anything id say get your intake, plog, and downpipe. You could still use the plog for turbo. As far as cams go...wait on it. Get a turbo cam when you go turbo. I don't really like cartuning kit. The Z7 kit is better imo
 


mvp04nv said:
Well, I plan on adding headers, K&N intake, cams & perhaps a cartuning turbo kit.

That seems to be about it...for now

Turbo is definitely one of the last of my projects though seeing how expensive it is
Click to expand...

K&N = fail. Did I not already say that? Not sure where you would put the other camS...

mvp04nv said:
I have heard something about the custom intakes on ebay being cheap knock offs since they have smaller diameters or something...but anyway, what is a front powerlog & where can I get one of those?
Click to expand...

Front Powerlog Manifold. Buy from ZZPerformance.

Not EBay intakes...custom...meaning you make it yourself. There is a write-up in the how to section. Read that before you waste nearly $400 on a intake.

mvp04nv said:
Y is headers a waste on turbo?
but anyway I don't plan on adding turbo for awhile so headers, intake, cams, would be options now.
Click to expand...

CAM...as in one...you can't use headers on a turbo build because unless they are a one-off header...they don't exist.

QwikGT said:
cam......singular
Click to expand...

OH...There it is LOL
 
i found my TOG's through a google search. i guess i got lucky. the guy jonbob on clubgp owns TOG so im sure he has sets lying around.
 
Dont spend $600+ on headers if you plan on going turbo down the road... Get a front stainless steel powerlog off of zzperformance.com Then save your money for turbo. I would look at the Z3 kit on zzperformance.com it is a base kit but its simple and has put out some good numbers for power so far for the cost of it. You could probably get away with getting that kit, some 1.9 rockers and piece together your own intercooler and run low 12's or high 11's. Then the tranny will probably start to give out.
 


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