Frostydc4

iTrader: (3)

AFIAK only XERD & Supersprint make full length headers for the Z33 & V35. I searched the archives and found some information about them. Is anyone using them and if so what are your impressions (I want to recieve feedback from those using the supersprint headers as they are really hard to find in the US). How is the quality and durability of the XERD headers? Does anyone have before & after comparison dyno charts? Do you lose a lot of low end torque with either headers? From what I hear (and what I have reasearched) these headers really boost power in the top part of the powerband. Thanks!

davidv

iTrader: (2)

My apologies for not being able to answer your questions, but sure would appreciate photos after the install. Thanks.

ReavTek

iTrader: (1)

I am also interested in a set of Long Tubes. As far as I know only XERD and Supersprint have had them on the market. 350EVO was supposed to make a set but they got out of the 350 market.

LOU

iTrader: (2)

I think BJ at 350EVO had the XERD headers then switched to Crawford and made more power or torque, I can't remember exactly.

You can email him:
bj@350evo.com

thawk408

iTrader: (16)

Yeah, im pretty sure that 350evo switched to crawfords for their racecars.

randyshemin@comcast.

www.crawfordzcar.com

Long tube, equal length headers:

coachk

iTrader: (21)

I have had my Xerd Headers along with Injen Exhaust for approx.2 years and they are IMO very good quality and durable.I did lose low end tq and I agree that there is a considerable amount of MORE power in the upper powerband.I did see a big increase in HP with the headers and exhaust but I also had added other mods at the same time.I'll see if I can find my Dyno sheets.

plumpzz

iTrader: (10)

randy aren't long tube headers replace test pipes??

PoWeRtRiP

tis true. long tube headers have the collectors merge where the cat used to be. the crawfords may have "long" primaries, but they are in fact equal length shorties.

Acree

iTrader: (29)

Yes, Long tube replace headers and cats. Crawford headers are "Equal Length" but they are not long tube.

randyshemin@comcast.

The Crawford headers have 26" tubes and meet up to the cats in the stock location.

The rest of the discussion is "how long is long"?

Acree

iTrader: (29)

Nice info and good point. Ok I have the solution! These are Long Tube Shorties!

plumpzz

iTrader: (10)

well i think long tube generally means replaces test pipes... so they're still shorties w/ longer piping. they're medium tube headers

ReavTek

iTrader: (1)

I just contacted Supersprint and spoke to a rep. Apparently they will be offering long tube headers, no price is available yet tho. And they are only for 2005 and newer Zs... LAME. :/ I didn't know Nissan made any kind of changes that would make headers for the 05 not fit on an 03 Z. Any thoughts?

mandm177

iTrader: (21)

https://my350z.com/forum/engine-and-drivetrain/157438-got-my-car-finally-dyno-ed.html

there's my dyno sheet with all my mods. next step is some kind of piggyback...IMO the headers helped out alot, but gave me alot of rasp because of the cat-deletes, but i dont mind it so much anymore...you get used to it

ReavTek

iTrader: (1)

On that dyno sheet.. the first run was without the headers and the second run with the headers? Or were both runs back to back with no parts changes?

mandm177

iTrader: (21)

back to back with no runs changed...sadly i never got a baseline...

TurboTim

iTrader: (11)

As a rule of thumb, a runner length of 36" would be optimal for N/A applications. Ideally a nice collector like the Burns stainless collectors should be used to maximize the powerband.

EnthuZ

iTrader: (2)

You mean something like this:

Grommit

iTrader: (3)

^ What header is that???