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SOUL | GT3 Side Muffler Bypass Vs Center Muffler Bypass Explained

Old 12-04-2018, 11:41 AM
  #16  
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Originally Posted by garudatwo View Post
John, with the valves open, would oem flow go through both the loud and quiet path in the side mufflers?

Edit: if I want OEM quiet with valves closed and ear piercing loud with valves open, what should I do?
Given the side mufflers are on the car in valves open mode, the exhaust flow is going to follow the path of least resistance and pretty much go straight through. That said, a minor amount of that exhaust flow/pressure will bleed off into the "quiet" path of the side mufflers, therefore valves open with factory side mufflers is never going to be as loud as the same setup with side muffler bypass pipes to delete them.

The exhaust upgrade to the mufflers with the biggest transition (most quiet valves closed, loudest sound level valves open) is going to be our center muffler bypass pipe. As shown is our lovely diagrams (great job Mike Spock!) this is because the valves open flow of the factory side mufflers is Less restrictive on sound than the factory center muffler, and the valves closed flow of the factory side mufflers is More restrictive on sound than the factory center muffler

Originally Posted by krell View Post
That is the first LG I've seen with those color wheels. Looks great and it's nice to see something besides the black ones.
Brett sure knows how to spec a car, I'm still torn between these and the black with green stripe. Gavin at Autoquest did one heck of a build on his with the black/green wheels, i'll have to find a photo and post it up.
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Old 12-04-2018, 11:54 AM
  #17  
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Originally Posted by cbrett View Post
thanks krell! i really like the silver wheels on it. i took off the black "GT3RS" side script for the clear bra, but am thinking i will put a new one soon.
Brett I read your review above this morning and couldn't stop smiling. Thank you so much for all the kind words and your confidence in myself and our team here. You are invaluable as a client and a friend

Are you planning on going to the Smokies GT meet next year? We have got to hit the Skyway together again, I still daydream about that weekend haha.
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Old 12-04-2018, 12:50 PM
  #18  
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Originally Posted by Soul Performance View Post
Brett I read your review above this morning and couldn't stop smiling. Thank you so much for all the kind words and your confidence in myself and our team here. You are invaluable as a client and a friend

Are you planning on going to the Smokies GT meet next year? We have got to hit the Skyway together again, I still daydream about that weekend haha.
thanks john! yes, already registered for Smokies GT and can't wait. that day on the skyway was epic!
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Old 12-04-2018, 12:54 PM
  #19  
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Originally Posted by cbrett View Post
​I have previously run SOUL PP race headers on my GT4 and sport cats on my 991.2 C2S Cab. I enjoyed those so much that I kept pushing John to get an early set of the SOUL valved SMB's for my new GT3RS. I think I ended up with the first production setup and installed them over Thanksgiving weekend.

This product like the others that I have purchased from SOUL is top notch quality. The ship time was fast and the packaging was great. The finish of the products is very nice and clean. The customer service is second to none, which anyone who has worked with John will attest to as well. It doesn't get better than this.


I am no mechanic by any means, but have installed a couple Porsche exhausts over the years. I would rate this job as a 4/10 in the difficulty range. All combined it took me a solid 5-6 hours solo to install it. It was very straightforward, and everything matched up perfectly.

The sound of this setup is just about perfect for me. I would rate the stock exhaust at a 6/10 in terms of the loudness that I personally desire at full throttle. The SMB's took it to a 8.5/10. They made the tone slightly deeper, but really kept the exotic sound of the stock car. I can't notice any drone with valves open or closed. In retrospect, I probably would have gone with the non valved SMB's given that I press the PSE button first thing after I start the car, and this car isn't a DD for me. I think I could easily have a phone call on my way home from work with the PSE on with no issues.

For me this modification fulfilled my desires of maintaining the stock exhaust quality but making it louder while dumping some weight and heat soak from the rear of the car. I really don't think you can beat the combined quality, value, and customer service that the SOUL products provide.









Did you have to lower your car to compensate after removing 35lbs off the back?
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Old 12-04-2018, 01:07 PM
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no i did not. i also installed a BBi harness bar, so i figured it was close to a wash.
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Old 12-04-2018, 01:33 PM
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Originally Posted by cbrett View Post
no i did not. i also installed a BBi harness bar, so i figured it was close to a wash.
Lizard, non-Weissach, decal delete, silver wheels... this probably the best specced 991.2 RS I've ever seen. Wow.
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Old 12-04-2018, 01:53 PM
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Originally Posted by WantA997 View Post
Lizard, non-Weissach, decal delete, silver wheels... this probably the best specced 991.2 RS I've ever seen. Wow.
Seriously! Love the way this looks. No script, clean and the wheels look amazing.
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Old 12-04-2018, 02:16 PM
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thanks for the nice words! its about as "plain" as a LG RS can look!
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Old 12-04-2018, 02:40 PM
  #24  
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Originally Posted by texascarlover View Post
Did you have to lower your car to compensate after removing 35lbs off the back?
would you happen to have sound clips of the valved SMD w/ the stock RM?
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Old 12-04-2018, 02:42 PM
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its on the too do list! hopefully this weekend.
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Old 12-04-2018, 03:13 PM
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Originally Posted by cbrett View Post
its on the too do list! hopefully this weekend.
Looking forward to it — thanks!
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Old 12-04-2018, 11:34 PM
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Anyone know how long the stock center muffler on a .2 might last with Side Muffler Bypass? Planning on only 3-4 track days a year...5 at most.

Also anyone dyno Side Muffler Bypass Pipes? I dont want to lose torque for street use.
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Old 12-04-2018, 11:37 PM
  #28  
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I have ordered the CMB and hope to have ti delivered by next week.
I will put up some really nice before & afters for everyone to compare


Furthermore, i would like to add that John at SOUL is is a gentleman. In my dealings thus far his customer service is and attention (ie- replying to emails fast etc) is refreshing.

I don't know about everyone else, but it's not just the product that matters. We want nice prompt service too at a fair price without the "Luxury Car Tax".
As car guys, when we get an idea in our head that we want a mod, etc, we want it now! Haha. And contacting a shop / retailer etc, we want to have the product ordered / on the way ASAP so we don't loose that momentum of the idea in our heads. [i am like this anyway]

John has been really diligent in replying to emails and keeping me updated etc. And even went out of his way to help me with ordering the seat angle adjusters and package them into the same shipment for me with the CMB at no extra cost.

Will start a new thread when the CMB is installed guys! And also the seat angle adjusters. + I just ordered the Pepita Houndstooth Inserts for my LWB seats! Will also do a nice picture set once they are in!

Last edited by goldberg; 12-04-2018 at 11:38 PM. Reason: Grammar Edit
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Old 12-04-2018, 11:38 PM
  #29  
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cbrett how do you like the auto stacker?
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Old 12-04-2018, 11:59 PM
  #30  
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Originally Posted by mdrums View Post
Anyone know how long the stock center muffler on a .2 might last with Side Muffler Bypass? Planning on only 3-4 track days a year...5 at most.

Also anyone dyno Side Muffler Bypass Pipes? I dont want to lose torque for street use.
Well, if I haven’t broken it..
Less torque but just keep the revs up
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