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headers versus bypass exhaust

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Old 05-14-2018, 10:29 AM
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dbulker
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Lightbulb headers versus bypass exhaust

Thinking about doing an exhaust bypass or header change on my 991.2 GT3. So far Dundon seems to be in the running for a full system but still trying to figure out whether a center bypass is good enough. HP addition is not as important. More important is the sound. Anyone live in the South Bay in Los Angeles who is happy with their exhaust sound that I could meet up with to hear the difference?
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Old 05-16-2018, 02:20 PM
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Blue Chip
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What are you looking to do? What are you trying to choose between? Doing a center bypass versus headers? As in, one or the other?

I'd think that anytime you can bypass one of the mufflers - that will get you more sound than headers.
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Old 05-17-2018, 07:57 AM
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Veloce Raptor
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Geez that car sounds so fantastic as is...
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Old 05-17-2018, 03:05 PM
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PM sent, I'd be happy to help : )
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Old 07-21-2018, 01:05 AM
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Brian C in Az
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Originally Posted by Blue Chip View Post
What are you looking to do? What are you trying to choose between? Doing a center bypass versus headers? As in, one or the other?

I'd think that anytime you can bypass one of the mufflers - that will get you more sound than headers.
I had the opposite experience. I got a small sound increase with an aftermarket cat back system. 96db passed sound check at the track
I got a huge increase in noise level with I installed cat-less headers. 90 db failed the sound check
Others told me the same happened to them...
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Old 07-26-2018, 01:31 AM
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Originally Posted by dbulker View Post
Thinking about doing an exhaust bypass or header change on my 991.2 GT3. So far Dundon seems to be in the running for a full system but still trying to figure out whether a center bypass is good enough. HP addition is not as important. More important is the sound. Anyone live in the South Bay in Los Angeles who is happy with their exhaust sound that I could meet up with to hear the difference?
The MotoIQ car is in LA. Maybe try to get a hold of them?

https://motoiq.com/project-gt3rs-get...sports-part-2/

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