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Cool, a lot of GMG love, have you heard the sharkwerks, how does it compare?
one other thing, the GMG RSR center is louder than the WC imo. I have also spent time in and around a car with it but not both at the same time. I feel like the RSR center is more rowdy. I don't work for GMG or anything but I have seen the quality of their products and they are top notch.
After hearing some of the clips though with center muffler bypass and headers it has me thinking of that now. Evoms headers or Dundon is probably what I would go with.
Obsessed Garage has a great interview with them on the engineering that goes into what they build:
Then theres also this at cruising speed and u get the idea how loud this thing can be, skip ahead to 7:28: http://youtu.be/mkKJ1tphpd8?t=7m28s
Adding this alone, there is some loss in the low to mid range, so i highly recommend you get the appropriate tune from Sharkwerks for the track exhaust which helps lessen this.
From having road tripped my car with the track exhaust from SF to SD, if you are cruising on the freeway over 80 mph, you will have drone, and it is loud enough to have your ears ringing if you are driving for more than an hour.
WOT you will scare people, but if you keep it between 2800-3200 RPMS, you can cruise around and easily have a conversation in the car or listen to the radio. Its all in how u drive it
The track exhaust began to wear on me, and I was getting a lot of complaints at my condo as well. Also with news on headers becoming available, I decided to try something different, with the mindset knowing I would be adding headers shortly after.
Bypass
While I do miss my track exhaust at times, there are more times Im happier with the bypass, including interstate driving, especially in stop and go traffic. My biggest worry when I went form the Track Exhaust to the Bypass was, am I going to be happy at all with this, and to answer that question, yes I have been.
Sharkwerks Bypass dB info measured at 1 meter behind the car at a 45° angle.
Idle:
Stock 77 dB
SW 81 dB
3000 rpm:
Stock 87 dB
SW 96 dB
4000 rpm:
Stock 93 dB
SW 100 dB
5000 rpm:
Stock 99 dB
SW 106 dB
6000 rpm:
Stock 101 dB
SW 108 dB
Sharkwerks Headers/Cats and Bypass
After going from Track exhaust, to Bypass, and now Bypass plus Headers, I can say this is the best combination. From a sound perspective, there is ZERO drone. This thing is track exhaust loud when WOT, yet bypass quiet when just cruising around. The best way to describe it is imagine being able to turn the volume up on the bypass. At WOT, the sound is a very clean wale, much cleaner sounding than the track exhaust which i thought was a little muddy.
More importantly than sound, with the retune optimized for this setup, there are significant gains across the range. The mid range pickup is significant to tell by the butt dyno, where i dont feel the need to have to gear down if im not in the ideal gear.
The Sharkwerks/Evoms Headers come with 200 Cell cats. They are fully modular so you can remove the cats when you go to the track and replace with a test pipe, which is nice so you arent burning your cats out.
I also added the Carnewal Remote Valve switch so I could control the functioning of the valves at any time.
Another option that was not available back when I did this is the Dundon Race and Street header setups with Loud or quiet rear muffler. Top notch stuff that makes power.
Wow, great information, thank you!
Do you have any issues with emissions or CEL's with your setup?
After hearing some of the clips though with center muffler bypass and headers it has me thinking of that now. Evoms headers or Dundon is probably what I would go with.
Dundon is a pretty penny for sure, it looks like a cool setup, again my concern is with emissions/CEL's
If going this route will not throw CEL's and it will be able pass emissions testing, I just may do it.
No CEL's with their street setup and it should pass emissions since it will have cats in place. The emissions part is all dependent on your state emissions test. In Georgia it is a simple plug in test and a quick look (sometimes they don't even check) to see if the cats are in place.
Last edited by Seth Thomas; 09-06-2019 at 04:11 PM.
No CEL's with their street setup and it should pass emissions since it will have cats in place. The emissions part is all dependent on your state emissions test. In Georgia it is a simple plug in test and a quick look (sometimes they don't even check) to see if the cats are in place.
Dundon is a pretty penny for sure, it looks like a cool setup, again my concern is with emissions/CEL's
If you got sport cats, I don't see it being a problem. But I would call them to discuss. They should be able to help you out. I also believe they offer a 30 day money back guarantee on their products.
If you got sport cats, I don't see it being a problem. But I would call them to discuss. They should be able to help you out. I also believe they offer a 30 day money back guarantee on their products.
at cars and coffee i consistently get asked about my dundon set up, but it shines at the track
09-05-2019, 09:06 PM
