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Dundon Race Headers on 991.1 GT3

Old 01-12-2019, 03:03 AM
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Alan C.
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Default Dundon Race Headers on 991.1 GT3

Just installed a set of Dundon race headers on my 991.1 GT3. Easy install. Didn't remove the rear bumper or center muffler. Did remove the rear wheels. Every thing lined up. There was no pushing, pulling or beating required during the installation.

The first thing I noticed was the aggravating drone in the stock system in the 3200-3700 range was gone. Next up the increased pull. It is apparent. And then there is the sound. Absolutely amazing on the run to 9k. Equally amazing was driving around town with no noticeable increase in sound level. No problems with conversations. I put about 100 miles on the headers today and I haven't had any CELs.

I had Dundon headers on my GT4 and I can't imagine putting anything else on my next car.
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Old 01-12-2019, 03:20 AM
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Originally Posted by Alan C. View Post
Just installed a set of Dundon race headers on my 991.1 GT3. Easy install. Didn't remove the rear bumper or center muffler. Did remove the rear wheels. Every thing lined up. There was no pushing, pulling or beating required during the installation.

The first thing I noticed was the aggravating drone in the stock system in the 3200-3700 range was gone. Next up the increased pull. It is apparent. And then there is the sound. Absolutely amazing on the run to 9k. Equally amazing was driving around town with no noticeable increase in sound level. No problems with conversations. I put about 100 miles on the headers today and I haven't had any CELs.

I had Dundon headers on my GT4 and I can't imagine putting anything else on my next car.
Yeeeeesssssss
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Old 01-12-2019, 04:56 AM
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Originally Posted by Alan C. View Post
Just installed a set of Dundon race headers on my 991.1 GT3. Easy install. Didn't remove the rear bumper or center muffler. Did remove the rear wheels. Every thing lined up. There was no pushing, pulling or beating required during the installation.

The first thing I noticed was the aggravating drone in the stock system in the 3200-3700 range was gone. Next up the increased pull. It is apparent. And then there is the sound. Absolutely amazing on the run to 9k. Equally amazing was driving around town with no noticeable increase in sound level. No problems with conversations. I put about 100 miles on the headers today and I haven't had any CELs.

I had Dundon headers on my GT4 and I can't imagine putting anything else on my next car.
Stock side and center mufflers?
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Old 01-12-2019, 05:40 AM
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Loved this on my .1 GT3 as well eventually added their loud black center muffler
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Old 01-12-2019, 10:14 AM
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Another satisfied Dundon customer. Then again, the Dundon in your GT4 was epic sounding.

I, too, had the full Dundon install done Fri on .1 RS. First Dundon set up; headers, side deletes, lifetime center section. Wow! Does it sound great. You can drive around with PSE button off and it is just slightly louder than stock. Engage PSE and under load .... BAM! She lets you know your driving something special.

This exhaust is a transplant from PT3's .1 RS and I can remember clearly how loud it was on that car. I do like loud and no drone.
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Old 01-12-2019, 11:20 AM
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Awesome, Alan. How would you rate the power increase?
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Old 01-12-2019, 01:10 PM
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Rob, The car feels much better in the 4000 - 5500 range. The dip is gone. The run through 3rd gear is a blast. The pull from 6000 - 8500 is noticeably improved . Had I added these to my previous '15' I most likely would not have traded for the GT4. However, the GT4 with Dundon race headers and TPC DSC was a special combination. I had a lot of fun in that car.
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Old 01-12-2019, 01:13 PM
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Originally Posted by robmypro View Post
Awesome, Alan. How would you rate the power increase?
Thinking about getting a set?
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Old 01-12-2019, 01:26 PM
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Alan C.
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Originally Posted by Buteo View Post


Thinking about getting a set?
You won't regret getting them. In the highly unlikely case you do not like them Dundon is the only one offering a 30 day return policy. Hard to go wrong with Dundon.
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Old 01-12-2019, 01:31 PM
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Originally Posted by Alan C. View Post
Rob, The car feels much better in the 4000 - 5500 range. The dip is gone. The run through 3rd gear is a blast. The pull from 6000 - 8500 is noticeably improved . Had I added these to my previous '15' I most likely would not have traded for the GT4. However, the GT4 with Dundon race headers and TPC DSC was a special combination. I had a lot of fun in that car.
Sounds like a winner! Thanks for the feedback.

Originally Posted by Buteo View Post
Thinking about getting a set?
You like spending my money, donĺt you Tyler? lol
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Old 01-12-2019, 01:44 PM
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Awesome! I would love to have them on my. 2 but we have state emissions test every year and I heard more CELs on the .2.
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Old 01-12-2019, 02:22 PM
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Originally Posted by robmypro View Post


You like spending my money, donĺt you Tyler? lol
We only love once my friend!...I just splurged on an Akrapovic slip on that I found in the marketplace. Debating on combining with the Dundon again just like my gt4.


Alan- does the Dundon Gt3 header remove the side mufflers? Looks like it from the pictures I see.
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Old 01-12-2019, 04:21 PM
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Alan C.
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Originally Posted by Buteo View Post


We only love once my friend!...I just splurged on an Akrapovic slip on that I found in the marketplace. Debating on combining with the Dundon again just like my gt4.


Alan- does the Dundon Gt3 header remove the side mufflers? Looks like it from the pictures I see.
Yes, The Dundon headers eliminate the side mufflers dropping about 40 lb. in the process.
Meaker, Dundon has a catted set along with two muffler choices. I believe Dundon is working on a solution to the CEL issue.
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Old 01-12-2019, 04:32 PM
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Seth Thomas
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love the results Alan. When the ECU adapts to the headers it will run even better than it is now. Glad the ride down the strip helped you know what you were getting before you bought them.
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Old 01-12-2019, 06:12 PM
  #15  
Alan C.
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That ride was worth the trip!
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