SOUL | GT3 Side Muffler Bypass Vs Center Muffler Bypass Explained
#121
Three Wheelin'
That's what I like to hear! Give us some more details when you can, I know the weather isn't quite ideal for some seat time and further analysis right now. The warnings of "don't breathe deeply or talk outside" in the States right now has been a little worrying. Stay warm!
#123
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Im no professional videographer or youtuber but here is a quick cold start from the dealership.
https://m.youtube.com/watch?v=AWTdOtDCUFA
https://m.youtube.com/watch?v=AWTdOtDCUFA
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SOUL PERFORMANCE PRODUCTS
Quality Exhaust Solutions, Fair Pricing, and Outstanding Service
John Gaydos- Owner, Performance Specialist
Cell - (484) 883-6197
johng@soulpp.com
Jon Wheel - Marketing Manager
jwheel@soulpp.com
SOUL PERFORMANCE PRODUCTS
Quality Exhaust Solutions, Fair Pricing, and Outstanding Service
John Gaydos- Owner, Performance Specialist
Cell - (484) 883-6197
johng@soulpp.com
Jon Wheel - Marketing Manager
jwheel@soulpp.com
#124
Three Wheelin'
Very livable so far. Quite pleasantly surprised! Ive been staying under 4K rpms for the first 600 or so miles. But just touching. 4K when the valves open it comes alive!
My tech was quite impressed with the build quality as well. A+ from him.
My tech was quite impressed with the build quality as well. A+ from him.
#125
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Anybody have any issues passing sound?
A few fellows reached out that needed to drop DB at some autocross events for SCCA and we were happy to oblige and develop these resonated turndown tips. They take minutes to install as it's simply three nuts holding on the factory tip assembly. The turndown tips themselves use vband clamps and are quickly and easily loosened/adjusted to face whichever direction you’d like. Videos and DB testing to come as they begin to make their way to our customers that requested we tackle this project.
A few fellows reached out that needed to drop DB at some autocross events for SCCA and we were happy to oblige and develop these resonated turndown tips. They take minutes to install as it's simply three nuts holding on the factory tip assembly. The turndown tips themselves use vband clamps and are quickly and easily loosened/adjusted to face whichever direction you’d like. Videos and DB testing to come as they begin to make their way to our customers that requested we tackle this project.
#126
Race Director
^^^ This has TrakCar Euro Delivery written all over it!
#128
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Yes it is, shouldn't take but a few minutes to change it out as it's only 3 nuts holding the tip assemblies on. Not sure on the DB reduction yet, I have two sets going out next week for some guys to some testing one on a 991.2 GT3 and the other a 991.2 GT3RS. Should also have little impact on performance, the center muffler outlet holes are 59-60mm and these turndown tips are about 63mm
#130
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Here's a back to back video of a GT3 RS with our Center Muffler Bypass Exhaust followed by SOUL Modular Competition Exhaust (Center Muffler Bypass Exhaust + Valved Side Muffler Bypass Exhaust).
#131
Has anyone noticed additional engine noise after installing the valved side muffler delete? I have a stock setup other than the Soul side muffler delete which I am extremely happy with. I believe it's valve train noise coming through as it's a faint clicking/hissing under low RPM's that eventually go away as soon as the RPM gets high enough to open up the exhaust. Maybe the smaller footprint muffler is allowing more noise to come through as the OEM side muffler is so large (fills the bumper) and blocked it? Not sure...curious if anyone else has noticed this. Thanks in advance.
#132
I just installed the SOUL Side Bypass Pipes (non-valved) on my 991.2 GT3 and the sound is awesome. I almost didn’t go for these because of some reviews of loss of torque / throttle response, and drone, but as per many others here, I’m not experiencing any of the above. I’m tolerant of a little drone so maybe don’t take my word for that, but I wouldn’t accept a loss in throttle response or torque and I’m not feeling any of either.
I had the Sharkwerks center bypass with valves disconnected on my 991.1 GT3 which I thought was great (almost did the same thing here again since this is strictly a road car for me, and I am more concerned about sound than weight/heat) but the side bypass pipes are fantastic, all-round. Amazing tone/richness/depth, quiet enough on low throttle for around town (I definitely don’t need valves for my volume tolerance), and like others have said, it really retains the stock noises, just with a little more/better sound, proper exotic cup-car like tone, just quieter. At some rev levels it barely sounds different than stock inside the car.
Thanks to John @ SOUL for the great service & advice on this one (always available for a call or email), considering how many options there are now, happy I ended up with the perfect set up for me.
I had the Sharkwerks center bypass with valves disconnected on my 991.1 GT3 which I thought was great (almost did the same thing here again since this is strictly a road car for me, and I am more concerned about sound than weight/heat) but the side bypass pipes are fantastic, all-round. Amazing tone/richness/depth, quiet enough on low throttle for around town (I definitely don’t need valves for my volume tolerance), and like others have said, it really retains the stock noises, just with a little more/better sound, proper exotic cup-car like tone, just quieter. At some rev levels it barely sounds different than stock inside the car.
Thanks to John @ SOUL for the great service & advice on this one (always available for a call or email), considering how many options there are now, happy I ended up with the perfect set up for me.
#133
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I just installed the SOUL Side Bypass Pipes (non-valved) on my 991.2 GT3 and the sound is awesome. I almost didn’t go for these because of some reviews of loss of torque / throttle response, and drone, but as per many others here, I’m not experiencing any of the above. I’m tolerant of a little drone so maybe don’t take my word for that, but I wouldn’t accept a loss in throttle response or torque and I’m not feeling any of either.
I had the Sharkwerks center bypass with valves disconnected on my 991.1 GT3 which I thought was great (almost did the same thing here again since this is strictly a road car for me, and I am more concerned about sound than weight/heat) but the side bypass pipes are fantastic, all-round. Amazing tone/richness/depth, quiet enough on low throttle for around town (I definitely don’t need valves for my volume tolerance), and like others have said, it really retains the stock noises, just with a little more/better sound, proper exotic cup-car like tone, just quieter. At some rev levels it barely sounds different than stock inside the car.
Thanks to John @ SOUL for the great service & advice on this one (always available for a call or email), considering how many options there are now, happy I ended up with the perfect set up for me.
I had the Sharkwerks center bypass with valves disconnected on my 991.1 GT3 which I thought was great (almost did the same thing here again since this is strictly a road car for me, and I am more concerned about sound than weight/heat) but the side bypass pipes are fantastic, all-round. Amazing tone/richness/depth, quiet enough on low throttle for around town (I definitely don’t need valves for my volume tolerance), and like others have said, it really retains the stock noises, just with a little more/better sound, proper exotic cup-car like tone, just quieter. At some rev levels it barely sounds different than stock inside the car.
Thanks to John @ SOUL for the great service & advice on this one (always available for a call or email), considering how many options there are now, happy I ended up with the perfect set up for me.
#134
Three Wheelin'
OK, was torn between the full race and just the CMB, but I just ordered the CMB only. We will see how it works for me, and if its not loud enough, I will get the rest of the system later.
Can't wait!!!!
edit: John talked me into trying the full system!
Can't wait!!!!
edit: John talked me into trying the full system!
Last edited by MJG911; 03-21-2019 at 07:20 PM.
#135
Rennlist Member
I'm a few hundred miles (and a track day) into my Soul valved side muffler bypasses and it's similar to how others have described it — similar to stock but more. Downshifts and burbles are more pronounced with a touch more bass. Above the RPM threshold that the valves open back up again I'd describe it as a louder bark that retains the factory's smooth and somewhat high-pitched tone without much rasp at all.
On the note of tire pressures, the car usually sits at 29/31 PSI cold and I would see upwards of 36 PSI with the side mufflers in the car. They usually hang around 33 PSI when driving around now.
On the note of tire pressures, the car usually sits at 29/31 PSI cold and I would see upwards of 36 PSI with the side mufflers in the car. They usually hang around 33 PSI when driving around now.