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Does anyone know for sure if the headers for 350Z/G35 coupe would fit FX35?
 

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They would fit but you'd probably have to modify the piping after the cats.
 

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mushutofu said:
They would fit but you'd probably have to modify the piping after the cats.
Huh? The headers go before the cats, so as long as they bolt up to the cats ok, everything is good.

To my knowledge, no one has tried any of the Z/G headers yet, but unless there is some slight difference in the angle of the flange that bolts up to the cats or something (which I doubt), they should fit just fine.
 

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What I meant is that the cats attach to the headers. So headers to cats to exhaust. I don't see why the headers would not bolt onto the ongine and cate to the headers. From there the exhaust piping will probably be different.
 

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Still not quite sure what you're trying to say. If the headers were angled differently where they bolt up to the cats, you would have clearance issues with the cats themselves. Re-working the exhaust in this case is not the solution. The headers simply need to fit what is already there.

I'd put money on the fact that they WILL fit just fine. Same engine, same cats, same exhaust (plus extended tips) as the G35c and there's MORE clearance under the hood around the engine to get them in there.
 

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Yea I would also bet they should fit just fine! I doubt Nissan would spend money to re-engineer new headers just specifically for the FX35 since it uses the same engine. They are cost cutting so my bet is on the headers fitting without any problems.

But.... I take no responsibility for them not fitting properly! hahaha. :lol:
 

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Excellent choice. 8)
 

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esemes said:
That crazy turn isn't bad? Interesting- I thought the best performance came from as straight a pipe as possible.
 

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I think rather than a strighter pipe its equal length between the pipes where you get the best performance.
 

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The design also depends on where you want the power. The Crawfords are designed for maximum midrange gains, while most others will be aimed at peak gains.
 

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Those welds look kinda of nasty. The more weld you have the more chances of develping cracks in the long run. Also, ceramic coated headers start to peel after a while. I would recommend getting those headers Jet Hot coated before install.
 

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mushutofu said:
Those welds look kinda of nasty. The more weld you have the more chances of develping cracks in the long run. Also, ceramic coated headers start to peel after a while. I would recommend getting those headers Jet Hot coated before install.
There was a discussion about welds on My350Z; it's pretty much a non-issue. As for the material. you're right; I originally thought the Crawford heasders were stainless, but I just double checked and they are not. They're not ceramic coated, however, they're high temp powder caoted, which they say will stand up to the heat. I found a thread where this was discussed and one of the Crawfros guys said that it would cost about the same amount extra to do they Jet Hot coating as it would to get them in stainless, but if you wanted something special, just call doug and he's work it out with you. SO, if you do want to get them Jet Hot coated, just call 'em up and have them do it. One stop shopping.

Here's the comments I found on My350Z (start at fifth post):
http://www.my350z.com/forum/showthread. ... genumber=2
 

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Make sure to heat wrap them before installing them.
 

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ujmot said:
Make sure to heat wrap them before installing them.
Actually, I've heard that's one thing you DON'T want to do. While it does keep under hood temps cooler (kind of moot point in an FI car with CAI, anyway), it promotes much more rapid degredation of the headers themselves by not allowing them to radiate heat.

This is something you may want Doug's opinion on or check around with the guys on the Z forum; that's where I remember the issue being discussed in the past.
 

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That's interesting. I've never heard that argument before... the benefits of wrapping that I've heard/read was not only the heat issue (which will obviously make the engine bay significantly hotter), but that an insulated tube actually helps accelerate the exhaust gases (over a non insulated tube) out.
 

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OOOOH boy I like these!!!!
 

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My $.02 on headers...

Mandrel bent equal length tubes creates the best power. If a tube uses mandrel bends, to the gas flowing in it, it is essentially straight. The pictures of those headers look nice and I bet the make good power.

WRT coating, Jet hot is the way to go. If you run those headers with just the ceramic paint, it will chip off and rust after about 6 months (ask me how I know).

Also, I am not a fan of header wrap. It retains moisture and disintegrates your headers. If you Jet Hot coat them, the coating acts in the same way header wrap does. It semi-insulates the tube and draws the gases down line.

Oh, it also looks p1mp! 8)
 

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$0.01
-Equal length best(therefore the twisted shape)
-wrap will deteriorate the metal..go for a good coating
-holding heat in accelerates the gases(good thing)
-The cat to Y-pipe fits and these bolt to that...should be ok
-go 35's
 
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