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Our friend Robert blasting through the mountains in his 991 GT3RS equipped with our Long Tube 321 Stainless Steel Catted (200 CPSI) Street Headers and Valved Side deletes.  The Cats can be swapped out for test pipes...

991 GT3RS Race and 991GT3RS Street Systems

991 GT3 Dundon Race Headers 1/4 mile trap speed study.

So here is my final review about these dundon headers: - First of all, these headers are beautiful.... they look so good that I just want to hang them on my wall. A quality product! Comes...

Emissions control, engine control, Intake air temp influence on power, dyno

I'm very happy with it. In terms of affecting the cars outright performance, as such, I cant really say till I've been on the track, strip or Dyno with it - but Ill eat my...

Video doesn't do it justice you need to hear it in person holy crap does it sound good! I thought my center bypass sounded good but these race headers blows it out of the water...

Derek RS Review from Rennlist

We recently had a US Spec 991 GT3RS in the shop and the owner was gracious enough to let us get a baseline on our dynapack hub dyno, test the catted system and install and...

Would like to make a review of the products as well as the customer service of Jamie in particular. Summary - High quality products paired with superb customer service - highly recommended! Just a brief background on...

I had the DMS race headers fitted to the GT3 whilst I was in NZ for a week earlier this month. I should note I also had the KMS filters supplied by Dundon Motorsports, fitted...

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