DOCG

Looking into ordering a long tube headers for my 2015 GT3. Would like everyones input on the differences between the 3. Experiences? thanks

PhilT3 (PT3)

My view:
They are all gonna be good. The main reason I chose Dundon was to support their innovation.
Example: https://rennlist.com/forums/991-gt3-...ing-intro.html

As far as I can tell, no other shop has been pushing the innovation of the 991 GT platform like Dundon. Innovation like this is what pushes the industry forward, forces competition and this all ultimately benefits US, the customers. I want to work with a company like Dundon. And that's how I made my decision.

This is NOT to say GMG and Fabspeed are not good companies that make good products. I have a great deal of respect for GMG's experience on the racing circuit and would love to work with them for track prep services. And Fabspeed provides a great value for customers not focused on track use.

Bottom line.... you can't go wrong with any of the companies products you've named.

4porsh

+1 for what PT3 said.
A happy Dundon Motorsport customer.

DDWPartners Ryan

I have the Dundon system on my RS and am very happy with the gains, sound, quality, etc. I have several videos of my car on my IG if you want to check them out. A few racing a GT3, some in cars, etc.

https://www.instagram.com/ddwcarsinaz/

Jamie@dundonmotorsports

I'm biased, but what they said ^^^

CAlexio

If you check the dundon gt4 header thread on this forum, there will be a very definitive answer to this question in just a few days. It's not subjective, the answer will be clear as day to everyone.

Jamie@dundonmotorsports

He's asking about 991 GT3 headers, and the answer is clear has been for a while...

Here's the reviews and others to ask about it

As far as reviews take a look here:

Take a look at some of the reviews
Here's Matt's thread on the 991 Race header results.
https://rennlist.com/forums/991-gt3-g...s-exhaust.html

Here's Macca's review:
https://rennlist.com/forums/991-gt3-g...w-991-gt3.html

Don't take my word on it, ask:
money2356
911_RS
GT3 KSA
DDWPartners Ryan
Macca
Derek RS
Slip

I can give you more names as well...

Videos in our threads with time slips of a 991 GT3 owner in Qatar racing 991 Turbo S and losing by 0.05sec... (would have been a nice one to have in the bag). Also showing the ET and trap speed gains

GT3RS with Dundon Race in Dubai racing and beating stock RS's by car lengths. (this just happened a few days ago).

They are made from 321SS which is far superior to the cheap 304SS that many other vendor's use. Our valves are high quality OEM style and our merge collectors are custom made to our specs out of 321SS.

Dundon Race Headers carry a lifetime structural warranty and 100% satisfaction guarantee!

And you're right CAlexio, the GT4 stuff will shake out and we'll get to the bottom of it, just need more hours in the day...

Zulu Alpha

Tried a friends Dundon RS, can't say enough good things about this exhaust. It is exactly how an RS should sound. Had it not been for a strict warranty policy here in Dubai, it would be this exhaust.

MileHigh911

DMS has been the most transparent aftermarket company on RL. They showed every step of the way in development. (Good and bad). And when they see things that didn't look as good as they could be, spent the time (in combination with knowledge of the flat 6 and experience) to figure it out.

Guest89

Can you provide cliffs notes on that discussion?

Tried to read back but the thread was pretty cluttered.

RealityGT

It is cluttered.. Here is the gist..

• Independent tests have not backed up manufacturer claims (not even close)

• Well respected speed shop tried testing independently -their method of testing was questioned (ridiculous) and advised that they "didn't do it right"

• Said speed shop tries with the recommended filters and still cannot replicate gains.

• Attacks begin on Speed Shop credibility and motivation for posting results.

• Another group of 3 owners will be testing to provide their findings.

Derek RS

Very happy with my race headers by DMS worth every penny

kfmcmahon

^^is this for the GT4 or GT3?

Jamie@dundonmotorsports

Customer took their GT4 to a shop that requested they come up there for free install and "independent testing" Said shop sells competing products. The ran the car and didn't achieve the results. Instead of investigating reasons why, the conclusion was that Dundon was hiding something, deceiving the owners or other devious behavior. They continued to test cars in a similar way achieving similar results.

We are putting together a test to understand how this is possible and why. We believe from our own testing (that we've been completely transparent about) that the method of testing is part of the issue. Also there is a lot of confusion about what our claims are (we report data to redline, reported data doesn't go to redline, stops before, our max gains are close to redline, etc. etc...) and what the data is saying.

We're not hiding anything or shying away from understanding what's going on.

I'd request that if people want to see that thread they go over there, not clutter this one up.

Dundon 991 GT3/RS products have repeatedly showed advertised gains with only happy customers.

The fact that some loud voices are pushing that we are somehow "shady" or "deceptive" is the ridiculous part.

Anyone who has our products knows we are anything but...

RealityGT

^^That's regarding the GT4 thread.