I plan on installing headers soon and I need to know if anyone has any idea how to DIY, difficulty and special tools needed. I also need to know from you guys that already have headers was there a difference, butt dyno, and/or sound. Thanks for your help.

 

Here ya go, THE DIY header how to, this will end your search, doesn't matter that it's on a 350Z, it's the same job on a G35.
http://www.350zforum.com/tech/NISMOR...neheaders.aspx

I'm sitting on Nismo headers, I'd planned on having a bay area shop install them for me at $320, but I've had the headers for a couple of months, just can't find the time to get them installed.

"i, for one, am not a fan of glory hounds."

Dang straight, it's all about the glory of helping. Who have you helped today?

 

Thanks for the info.

 

Dsskyline:
The install is already covered above.

It is difficult because of very limited space to work, so figure at least 5 to 6 hours. As always, take your time and do not rush it.

As to difference, it really depends on your car and the sequence in which this mod is made. If your car is NA and this is the first exhaust mod, I think that a gain of perhaps 3-5 hp is realistic to expect (do not expect 10hp from a header change on this engine...some others yes, but this car has a very fine stock exhaust system from front to back, so gains are more marginal).

Sound should deepen a touch and there is a bit more grumble growl. However, it will not get much louder. The resonator/muffler set up keeps the volume pretty close to stock, and even changing out the catback exhaust to aftermarket will not do much for sound, though it should also add to power on NA.

What will really loosen up the throatiness is the high flow cats, at least that is what happened on my car.
Actual dyno run on my car gave a drop in hp when I put on both headers and CB together. Dyno tuner said that he had done several VQ35DE motors and that with headers only there was a gain, and with CB only there was a gain, and with both there was typically little gain, or even a loss in hp and torque. Indeed I lost hp and torque, and got very very little appreciable auditory reward. (Now that was an enthusiast's day that was tough to enjoy unless you really like to face challenge!!)

But when I changed out the cats to high flow.....got the hp back (plus 20) and the rich sound that I had been hoping for with the headers and CB. Just be aware of this potential.
I love the sound of the headers and exhaust now, but there was little bit of time in there where I was really wondering what was going on because the car's reaction was not at all like the classic American car experience of slapping them on and picking up bigger gains in sound and hp almost automatically
.
You have a much more complex platform, with 10.3-1 static compression on 3.5L (I think that is about 215cid, too early for me to do the math), compared to the classic low compression/high cylinder volume American car. Different little doggy altogether.

Have a good time with it and let us know what your results and reaction to it are.


Cpe 6MT/Aero/Prem/ATI/RT cats/Borla hdrs-catbcks/Nismo flywhl-cltch/TS-ECU/Tein flex EDFC/Stillen sways

 

Opps, just rechecked the the post where I saw a bay area's shops install price. It's not $320, it's $380



"All that's necessary for the forces of evil to win in the world is for enough good men to do nothing.”
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G35 6mt