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-   -   headers versus bypass exhaust (https://rennlist.com/forums/performance-modifications-forum/1068674-headers-versus-bypass-exhaust.html)

dbulker 05-14-2018 10:29 AM
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?

Blue Chip 05-16-2018 02:20 PM
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.

Veloce Raptor 05-17-2018 07:57 AM
Geez that car sounds so fantastic as is...

AutoQuest Motorsports 05-17-2018 03:05 PM
PM sent, I'd be happy to help : )

Brian C in Az 07-21-2018 01:05 AM
Originally Posted by Blue Chip (Post 15013744)
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...

spdracerut 07-26-2018 01:31 AM
Originally Posted by dbulker (Post 15007986)
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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