dfrhodes

http://web.archive.org/web/200406071..._headers&cat=2

MattiasH

PM sent.

CardinalCar

PM sent. Hope I'm not too late.

AO

Yes. These fit both 2-valve and 4-valve cars per the cached web link.

Tony

Going a little OT but...do you have one of those hand held lasers that scan items and digitize them? I saw one at SEMA a few years ago. it really was amazing. The guy scanned a part, uploaded it..edited the design and "printed" a prototype copy of his updated design.

I dont want to loose my X pipe or cats to install these..Ill pass.

wildguy

And that was before Shark Tuner! Can easily get even better results with Sharktuning.
I can remember what S4 did back them after the exhaust. I want to say it was 20hp gain (no tuning back then except adding fuel pressure). My S4 made 330whp and 340 torque and mine was an anomaly back then.
The sound can't be beat. I was voted best sounding car at a PCA DE event back in 2000.

U-928

.... Or affordable standalone!

terry gt

on my GT msds headers / x/ high flow cats/ 2 1/2 system added 31 rwhp . Colins cams made the exhaust work better . The level 2 headers with 1.75 primaries are for mod / big motors

namasgt

So are those dyno results with x-pipe. I was under the impression that adding x-pipe alone would increase the power by more than 10 HP?

atb

Sold out in 16.5 hours, actually I think that was a little slow considering how hard it is to come by a set of these. New no-less.

Mr. Piff

When I purchased mine I also got headers from devek at the same time

Mr. Piff

It's raining in ny( my car lives outside) for today and tomorrow. Will take pics and post. Purchased both headers and xpipe from devek back in 05-06 if memory serves correct.

Will check and let the forum know

wildguy

PMs sent. been busy at work.

jcorenman

A couple of points:

Not any x-pipe that was made to fit the stock manifold. But it would also be silly to try to mate these headers to a stock exhaust, the pipes are too small (2-1/8" approx). Think of these as the critical first step to a much better exhaust system, not an end to itself.

Those are not the headers that you are looking for. Those were MSDS-style headers (or maybe built by MSDS), non-equal lengths. The ones for sale here the later Devek Level-2 (L2) headers, which are much nicer.

As for dyno's, headers are not something that you can easily do an "A/B" comparison on, because they are only one part of an exhaust system and there are lots of other variables at play (cams for example).

Louie Ott did a lot of work with these headers, and with exhaust design. He has his own dyno and checked everything he did. Here is a thread started by Louie a few years back on this very topic:
https://rennlist.com/forums/928-foru...s-headers.html

[RANT] Unfortunately Louie's images (and dyno sheets) are no longer accessible, I presume because his paid membership has lapsed. That is a real shame, and something that needs to get fixed, somehow. Stuff like that is a resource for all of us, and part of why we pay our memberships. [/rant]

I think these headers, with a properly-designed exhaust system, are worth 20-30 hp compared to a completely stock exhaust. I would expect the gains would be smaller with S4 cams, and bigger with better cams.

Numbers for x-pipe alone are a little squirrely, because the x-pipe also comes with high-flow (or no) cats in place of the large factory cats-- so there is no way to separate x-pipe vs. better-flowing cats. The crossover is certainly worth something, and more with headers.

Here is a "serving suggestion". There are plenty of other options. This is our GT, with Devel L2 headers which Louie installed for the PO, and built the dual 2.5" exhaust for.

RKD in OKC

I tried to contact Darien a previous owner of my car. After I got it he told me that DEVEK put some sort of single exhaust with a huge pipe on it and an adj fuel pressure regulator and it dynoed 400hp.
The owner between Darien and myself put stock exhaust back on to pass Ohio emissions.