Porsche 991 GT3 / GT3 RS / 911R SOUL Valved Side Muffler Bypass Pipes
Shed 35 pounds and reduce heat soak while encouraging an exciting exhaust note from your GT3 while retaining valve functionality
+ Fits all Porsche 991.1 / 991.2 GT3 / GT3 RS models including 911R (2014-2019)
+ Weighs 35.4 lbs / 16 kg less than factory exhaust components (44.9 lbs vs 9.5 lbs)
+ Designed and built in-house at SOUL’s Willow Grove, PA facility
+ All Soul Performance Products components are backed by a renowned Lifetime Warranty for both street and track use
DEVELOPMENT AND TESTING: Deleting the side mufflers yields huge weight savings, helps with heat management in the engine bay, and keeps the rear tires cooler. The hole leading into the secondary pipe is enlarged to equalize pressure in the center muffler – promoting longevity. Flex bellows allow for easy installation and increase durability under extreme racing conditions in a similar manner to OEM. Large 3″ diameter primary piping increases flow. High quality valves operate like factory.
SOUND: The sound is smoother during the transition between open and closed versus a center muffler bypass. Valves closed tone is increased moderately while still comfortable with factory center muffler in place. Valves open reveals a refined, exotic pitch befitting of the high performance GT3 engine.
CONSTRUCTION: Each set is made from mandrel bent T304L 3″ .065″ wall stainless steel tubing and high quality flex bellows for maximum durability.
BOLT ON AND GO: Each exhaust is tested in a fixture to ensure perfect fitment and then foam packed to arrive in perfect condition, ready to install with no cutting or modifying required.
LIFETIME WARRANTY: Enjoy your SOUL exhaust components with confidence on both the street and track as the valves and entire exhaust are covered by our Lifetime Warranty! Our team will quickly work with you to resolve any issues or answer any questions that you may have.
NOTE: O2 bungs can be added (to work with aftermarket headers that relocate the bungs to the SMB). We do not add them by default in the interest of lightness. Contact us for this option.
Availability & estimated lead time
Special-order notice: Most SOUL Performance Products components are built or finished to order. Estimated lead times vary by configuration and production schedule, are estimates only, and are not guaranteed. Contact EuroCustomsPR before ordering if timing is critical.
The very best exhaust upgrade. Thanks for making these. Dropped 35 ish lbs. Gained some good sound but not too loud. The sound is perfection, especially the downshifts in my 991.2 Touring! Just what the doctor ordered.
Originally published on SOUL Performance Products.
Yesterday afternoon I installed my Soul SMB that I purchased used from forum member SPEEDYJ (great seller BTW). The install was pretty straight forward after watching the videos by Obsessed Garage. The hardest thing for me was getting the bumper cover back in place correctly. Now I 've done it once it'll be easy next time though. As you can see, I put the car on ramps to make it easier to access.
Quality of the SMB is great, even used. Drove it a few miles this morning and love the sound. As others have said, its a similar sound to stock, just turned up a little. Definitely a deeper sound idling with the valves open though. Very nice. The car is otherwise stock, for now! Dropped about 36lbs off the backend.
Originally published on SOUL Performance Products.
I installed my Soul valved SMB 2 weeks ago and have been extremely impressed all around. Best price, perfect quality, excellent packaging, easy install with perfect fitment. Way lower temps, lower weight, nice minor bump in sound with valves closed and incredible sound at full tilt. Can't recommend this upgrade from Soul highly enough.
Originally published on SOUL Performance Products.
I was out the other night and I have the Soul side muffler deletes on my .2 GT3. I have unhooked and plugged the valves so it just runs straight through below 4k rpm. Car sound awesome, nice tone below 4k rpm nothing obtrusive, can talk on the phone. tire noise can be louder than exhaust at 70-80mph under 4k rpm. Cruising through a neighborhood not much sound difference than if valves where operating and closed...just a little.
Keep in mind..I am a drummer...used to loud bombastic things...but the GT3 exhaust in this config is not loud and obnoxious...its really how the car should come and sound from the factory. The fit finish and quality of the Soul side muffler deletes are really really good. I have posted my comments on these before but just wanted to revisit 5 months or so later...still enjoying them and believe in Soul.
Not sure if I will ever hook the vales back up...its stupid simple if I need to...maybe next year and see what I think.
Originally published on SOUL Performance Products.
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.
Originally published on SOUL Performance Products.