ConcreteCowboy

i added the Dundon headers to my Akrapovic Race evolution set up on my RS last week..... Music to my ears!!!!!

Jamie@dundonmotorsports

Love it!

Here's some current pics and Dyno Video of the Ultra Quiet Version of the 321SS GT3 Center Muffler. The Goal of this muffler was to quiet the beast down and maintain all of the power created with our race headers. I can say with certainty that we have accomplished this. Driving the car around it is noticeably quieter and retains its character and power! On the dyno no losses, still making peak 433-435whp just like the factory Muffler. We measured between 10-15dB reduction over the race headers with the factory muffler standing behind the car.

Next is track testing including dB measurement on the Race/UltraQuiet and Street(catted)/UltraQuiet combos, if we can get it finished, we'll also bring the Loud muffler as well... A few tweaks we want to do to the guts and building the Loud muffler for the 321SS version. Ideally finalizing pricing and starting preorders in the next 1-2 weeks! Then it's on to the Ti version!

And don't worry, these aren't the Tips we'll ship with, working on a way to do swappable tips easily, the curve at the base makes it a bit of challenge but is part of the guts tweaking we're working on!






Dundon Ultra Quiet 3" lower inlet 321SS 997/991 GT3 Center Muffler



Dundon Ultra Quiet 3" lower inlet 321SS 997/991 GT3 Center Muffler

Jamie@dundonmotorsports

Just finished some track side testing:

Conditions: Clear skies, 75F, 50ft measuring distance on the front straight
991 GT3 Dundon Race Headers (catless, w/ side deletes)
OEM Muffler: ~102dB
Ultra Quiet straight tips: ~92dB

So about a 10dB reduction. With Turn aways would likely be 3-4dB further reduction.

PLEASE DON"T TAKE THESE AS ABSOLUTE MEASUREMENTS. How sound levels are measured, weather conditions, tip orientation, etc... have a HUGE effect on the absolute number.

We have further testing to do on it, should have a loud version to play with at the end of the week.
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Jamie@dundonmotorsports

Quick update,

Testing at laguna on a stock 991 GT3, only modification is the Ultra Quiet Center Muffler. Ran yesterday with Turnaways, passed in the morning session running flat up the hill with a passenger. Weather changed in the afternoon and ran without a passenger, blew a 93.3.

Joey from Emotion Engineering did the install and was very pleased with how easily everything just bolted right up.

From what I've been told there's been some attention at the track as well as to how Ken was passing when so many others were getting black flagged...

More updates after the download with the customer tomorrow. Should have video as well...

Jamie@dundonmotorsports

Another test today. 991 GT3 with side deletes. Previously blew 101.9dB even with part throttle and higher gear.

Today with the Dundon Street GT3 Center Muffler (quiet) still with side deletes, up the hill, 3rd gear, pedal to the floor, no flag for sound. Trying to get actual dB numbers, but many others were flagged.

Weather today is hot, humid, partly cloudy skies...

Pleased and a little surprised the muffler passed with side deletes!

Jamie@dundonmotorsports

997.2 GT3 was beta testing another prototype center and had no issues at all. Looks like it's time to get the preorder pricing and list together!

Alan C.

Good looking build. I like the way you attached the baffles.

Allegheny not AK?

Jamie@dundonmotorsports

Dundon Lifetime 321SS Race Muffler in testing will finalize this week, tips getting finalized and the Race (Loud) and Street (Quiet, tested at Laguna) are moving to production. Once finalized, intro pricing and approximate lead-times will be announced. Don't blow a hole in your stock muffler, put it on the shelf and pick up a lifetime muffler.

I'll get some video up this tomorrow of the new Race muffler, sounds great, no drone, and nice and crisp on throttle!

Jamie@dundonmotorsports

Hi Guys,

We're taking preorders for those that want to secure an Orange (quiet) or Black (loud) Lifetime Center Muffler. We're starting with a total of a 50pc batch, so don't wait, we already have 20 guys signed up!

We have the parts inbound and should have them in about 3 weeks. From there assembly begins, so we're shooting for the end of October, early November to begin shipments.

For those that didn't get to hear it, check out our blog post below (this is the loud)

http://www.dundonmotorsports.com/blo...n-race-headers

Intro pricing is $3250, use the code intro_muffler at checkout.

Any existing Dundon Header customers contact me.

Again to summarize:
321 Stainless Steel Construction
Louder than OEM (Black)
Quieter than OEM (Orange) options
Lifetime Guarantee
4" tips in PVD Black
Optional Turnaways at additional cost for the track guys.

Here's the link to our website.
http://www.dundonmotorsports.com/por...center-muffler
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daveo4porsche

what it the likely hood this will fit/function on a 991.2?

Jamie@dundonmotorsports

Will bolt right up. Direct replacement (991.2 uses the same muffler as the 991.1).

daveo4porsche

ordered!! thanks!

Jamie@dundonmotorsports

Thanks for the order!

Jamie@dundonmotorsports

Shells have arrived and production has started!



Perfect fit! Dundon Lifetime GT3 Center Muffler Shells and Baffles