I can't say I've done back to back comparisons with cars with other brands, but my Nismo headers with Jet-hot sterling DEFINITELY makes the car pull harder and more "freely" as the revs rise. Engine breathing is clearly better.

As far as quality goes, all Nismo stuff is top notch

 

Crawford...hands down.

 

Keeping the cats, or test pipes, in the exhaust is a major restriction in making ANY short headers do much if anything to improve performance. A properly designed LONG header is required to make REAL HP #'s. The current long tube headers being sold are a joke. I could show you pics of some REAL headers that MAY be marketed, but I would be flogged!

 

so crawfords are better than the alpha's? alpha's are like half the price and from one dyno I looked at they make the same tq/hp as the crawfords...are there an dyno's aout there that would justify the extra 500 bucks over the alpha's?

 

has anyone designed a full long header for the Z? my old dodge ram had those.. that thing was a beast.
also, can anyone inform me on "jet-hot"? im not familiar

 

Just go to JETHOT.com

Totally worth it, IMO!

If it's good enough to put on TopFuel cars, I think it's good enough for my little Z...

 

$675 regular pricing at Avalon Racing.

 

Crawford has not been proven...I would get Alphawerks/Nexus and guarantee at least 14rwhp gains, and as much as 21rwhp. Plus they are cheaper.

 

the crawfords arent proven? i thought they were? IF SO, WTF! all those people talking $hit about the alphawerks headers and rooting for the damn crawfords. damn it. stupid cheerleaders are messing with my head.

 

People think they are. Do a search, you'll find a whopping 3 dyno's. The owners probably just suggest them to justify spending $1200.

 

Topspeed are by the far the best headers when you consider price per hp. However, if you want the best of the best, most people feel that it is the crawfords.

 

That's weak. So you're calling all of the people who spent their own money and time getting us the dyno results on the Crawford headers liars?

What have you contributed other than your own poor speculation to this argument?

And to save you the trouble of asking, I've already put together a 17 car Z/G dyno day and hopefully will have another one ran on May 7th 2005 where we'll dyno 2 Crawford Packages and a plenum spacer or two.

 

I wasn't calling anyone a liar, i'm saying 3 dyno's aren't suffice to conclude that everyone will gain 20hp from the headers.

I suggested Crawford and Nexus, but that you are guaranteed to gain 14rwhp at the least with Nexus, with Crawford you aren't, but you should see some pretty good gains. So dyno's are now speculation? Hmm...

2 Crawford packages?...you mean a V5 plenum and cast vs. Motordyne and AAM plenum spacer? Ok... Why did you tell me this though?

 

Your continuing posting on this subject is far from what I would expect from a moderator of this forum.

How many Nexus dynos are you using to make this guarantee / speculation / conclusion. By the way who are you to make guaranties for either Nexus or us?

Do you have either our product or the Nexus product? No doubt you have a wealth of knowledge about the 350Z and the products offered, but do you even have a 350Z? If you do I apologize, but I dont think you should be presenting yourself by way of your suggestions if you dont have a "dog in the hunt".

Yes its true our headers are the some of the most expensive pieces. They are complicated hand assembled long primary length headers with a true collector. Its the way they would be designed for a race car. Yes its possible you can go a cheaper route and get comparable gains on certain stage of modifications. There is no argument there.

Just off the top of my head here are some members that have the headers and dynos: Doug(x2 cars),mjedens,zzzya,mcduck,Z cruzin, 350trackz(sold to another forum member), and myself. No doubt there are many others and these guys may not even have posted their dynos. Not everyone posts dynos, especially if it is the expected result. I suspect you would see plenty of complaints if a part did not perform as expected.

And yes, I will admit: its not that I am trying make sales with this post, but I am trying to not lose sales because someone wants to shoot their mouth off with or without purpose.

 

Are any headers out there street legal (CARB)? Anything I'd do to a Z would need to be able to pass a smog test, since I don't like dealing with those kinds of hassles.

 

Supersprint has some LONG headers.

 

And the picture...

 

Yes, it was immature of me to guarantee 14rwhp, I realized that as soon as I posted it. So let me rephrase, you will most likely get at least 14rwhp from Nexus headers.

3..well, from different people, each person had about 4. I didn't make any guarantees for Crawford and read above regarding Nexus.

Nope, unbiased opinion here. No, buying one this month.

I was referring to non-Crawford-related owners. I understand that, and i'm only basing this off the one's who have. Well, maybe, but, surely not if they didn't get a dyno. Most of the time it's mental, and the owner thinks he has gained a significant amount of power (not referring to your headers or any product specifically) and feels satisfied...which, is what modding is all about, regardless of what the dyno numbers say.

Not shooting my mouth off, nothing was offensive. I stated that there are 3 Crawford headers owners that have posted dyno's, there are 3 or 4 Nexus header owners that have posted dyno's I think the power difference is too little or not proven for either headers to justify going cheaper or more expensive.

I respect what Crawford does, I just disagree with a few products that they make, how they are made, pricing, ect.

If I were shooting for 300rwhp, I would go Crawford, no doubt in my mind (except for the high flow cats, I would get test pipes instead).


And btw, how is me giving my opinion any different than anyone else? I move threads for the most part, and give my opinion and some technical help when I can, and try to be as respectful as I can to everyone (i'm not going to say a product is good when I think there is something better).

 

Do these omit the cats? Is that what is meant when people say "full length headers" or are they simply referring to the equal length primaries? I never really knew the definition there.

 

The headers and connectors in the image above look nice...definitely omit the cats. Are they equal length, NO. You can see they tried making them equal length by placing the extra bends in the back most pipes, but the middle and front pipes are not equal. In my book, close enough...

Why doesn't Crawford's R&D team just team up with Alphaworks fabrication team and create a decent set of pipes between $700-800?

Ahhhhahhaaa, I crack myself up sometimes... I just bought the SS TS headers and called it a day! Seriously though, I feel like I got a steal when you think about all the work that goes into fabricating Headers for the Z