Alright, I've narrowed my choices on header companies between Alphawerks and CrawfordZ. My question is are CrawfordZ headers so good, that they're worth the extra $475 over what I would spend for Alphawerks. Now, CrawfordZ headers seem to get extremely good reviews around here, but I can't seem to find much on Alphawerks. What I've found on Alphawerks looks promising also, with horsepower numbers jumping up as much as 17-21whp. Basically, can CrawfordZ really provide enough extra hp over Alphawerks to justify the $1150 price tag. By the way, the Alphawerks are only $675.

By the way, below is a list of my current mods. All of these have just recently been bought, so none of them are on the car yet. But, at least you can now give a better recommendation based on my current mods.

Already bought
Z-tube
Stillen exhaust
Stillen CAI
Motordyne 5/16" spacer
Gordgee's grounding kit

Still to come:
Alphawerks or CrawfordZ headers
CrawfordZ high-flow cats

Anyway, please help me out. Thanks.

 

No one has an idea?

 

I can't talk intelligently on the topic but I know there have been extensive threads on it that you can find if you do a search.

From what I read, it was not worth the extra money but I'll leave the decision making up to you...

 

Yeah, my thoughts excactly. I've searched on this website, my350z, and 6mt. There's all kind of post about CrawfordZ being the best, but very few dyno's proving anything. I don't think Alphawerks headers for the G35's have been around long enough for very many people to really know the difference. Oh well, probably unless something changes, I'm going to buy Alphawerks headers this Monday.

 

I've posted my Dyno on this forum. I have an '03 6MT with the full Crawford Package, JWT PopCharger, and Invidia G200 Exhaust. The Headers gave me the biggest kick in the paints, followed by the Plenum. In my book the Crawford Headers are worth every penny. As a point of reference, my car is the Blue Line, the Red Line is an '05 6MT with the RevUp Engine and a 5/16" Plenum Spacer.

Lou

 

Yeah, I've seen your dyno before. Sorry for my ignorance, but one question I do have is; what does the 05 have besides 5/16" spacer?

 

Nothing! But, as I said, it's the RevUp Motor. Oh, I forgot to mention I also have the Technosquare Crawford Flash on my ECU. That's the reason I can rev above redline, where my power starts to fall off, but the RevUp starts to make more power than me.

Lou

 

What was your baseline dyno. According to my figures, you should have dynoed somewhere near 224rwhp bone stock. If this is correct then you had a gain of 24rwhp from all those mods, which is good no doubt. But, if Alphawerks give 17rwhp alone then I pick them or CrawfordZ. Please understand, that I'm not trying to down your mods in anyway shape or form. I'm just telling you what I see from the numbers alone. Anyway, just my 2 cents; thanks for listening.

 

I don't have a baseline Dyno, but 222 to 224 sounds about right. Where have you seen an independent dyno with ONLY alphawerks headers that showed a 17HP gain? No header will do that. BTW, the stock header is really not that bad, but the Crawfords are a work of art. A true collector, not just a larger pipe shoved on the end as a merge. And, all the pipes are equal length, about 22". No other header comes close to that. Oh, and no offense taken, but we are talking real numbers here.

Lou

 

Click on the link below. Coupeondubs pulled average whp gain of 17.64 whp and an average tq gain of 16.40 lbs/tq. This was is average of all 3 pulls. Now is baseline is a bit low, which is do to the dyno fans being turned off and his heavy *** 20's. By the way the CrawfordZ are sweet looking. Nice pic.

https://g35driver.com/forum/showthre...ght=alphawerks

 

Are the alphawerks headers an equal runner length like the crawfordz headers? I am very interested in the alphawerks headers.

 

Yes they are!!

Here's a link to a write up Super Street mag did on them, when they tested a stock 350Z and yeilded 21rwhp.

Super Street
http://superstreetonline.com/plugged...10_alphawerks/

Alphawerks website
http://www.alphawerks.com/ver03/index_frame.htm

 

I'm not going to argue with you guys, buy what you want. The Alphawerks don't look equal length to me, but if they are the runners certainly aren't 22" like the Crawfords. As far as the Dyno goes, Bottom line, that "G" put out 234+ HP mine put out 248+. That's 14HP in my book.

As far as the quality of the header for gosh sakes look at the collector and the bends of the runners. You get what you pay for, if you want an inexpensive header, fine. But, if it were me I'd go with the DC or Strup, same design, less $.

Lou

 

Does anyone know who has Crawford headers? I thought PerformanceNissan had them but they dont seem to be on their site anymore. Thanks

 

Whoa....what are getting mad at. No one is knocking you or your headers. All we're saying is the price is a little high. They're worth every penny in your opinion as well as other people here on the forums too. And there is no denying that they do make good gains. But, in others opinions they're too pricey. Now to me the Alphawerks look fine and yes I feel you on the Strup headers. I myself am still kind of up in the air on who to go with.

As far as that guys dyno is concerned. He has 20" rims which was dumb in the first place to dyno with big *** rims. Also the fans weren't on either; why I don't know. Both of those variables no doubt affected his overall numbers. How much we truly don't know. Either way, all he dynoed with was just the headers alone and made 17rwhp. That's impressive no matter what way you slice it.

The only way too really solve this is for someone to dyno the Crawford headers alone too. This will likely never happen, seeing as headers are usually the 4th or 5th mod to go on a car, not the first. Anyway, thanks for your comments and check back Monday to see what my decision is.