Description
DEVELOPMENT AND TESTING: We could not curb our curiosity of what a 991.2 C4S would sound like with a true straight pipe exhaust. Using 3” mandrel bent tubing straight out of the turbos to the rear of the car and fitting single wall turn downs, this exhaust system is radical, simple, and ferocious sounding. We approached AWE Tuning about testing our development car at their facility for third party dyno results. We experienced gains of 17 whp and 14 ft-lbs of torque at 6,500 RPM as tested on a 2017 Carrera 4S with no other mods. Peak power was up by 12 whp and 12 ft-lbs. Much greater gains can be expected from the freer flowing exhaust components when paired with a tune. During testing we experienced no CEL, but cannot guarantee the same results on all cars as all cars are different and unique.
CONSTRUCTION: Each exhaust is assembled out of thick wall .065″ T304L stainless steel and 321 stainless for the tips and rigorously quality checked in-house. Smooth mandrel bends and thick flanges precision cut by a waterjet ensure product longevity. It was also important that we retain use of the factory heat shields as to not heat soak the components around the turbos.
BOLT ON AND GO: Each exhaust is tested in a fixture to ensure perfect fitment then foam packed to arrive in perfect condition. Hardware and thorough installation instructions are included in the box for a straightforward install that can be performed by most DIY enthusiasts.
HJS CATALYSTS: Optional HJS HD 200 cell catalytic converters can prevent a check engine light. The highest quality catalytic converters available, known for their industry leading flow and durability. They are efficient enough to meet strict EURO 4 emission standards while still allowing for an increase in flow – all without a check engine light. The HD design uses premium triple foil winding for maximum strength. The brazing stripe is an extra feature in the interest of durability – it prevents the core from moving or experiencing any damage from sustained high horsepower abuse. We use a large and appropriately sized catalyst to allow for maximum gains – no compromises here!
LIFETIME WARRANTY: Enjoy your SOUL exhaust components with confidence on both the street and track as they are covered by our Lifetime Warranty! Our team will quickly work with you to resolve any issues that you may have.
NOTES
+ This product is not CARB certified and may not be legal for use on emissions controlled vehicles; intended for off road / competition use only due to removal of factory catalytic converters
+ United States based customers purchasing this product are required to sign our Catless Exhaust Component Waiver here.
Zylinderkopfdichtung (Rennlist) –
I’ve got a 2019 911 Carerra T configured nearly as lightweight as they could be ordered from the factory. My modification philosophy has been to remove weight rather than add power as, frankly, less weight is more fun than more power on the street. I’ve added an Antigravity battery, Essex/AP Racing brakes, and headers to reduce weight further. Exhaust after the turbos was my next planned mod, mostly as I wanted to take weight out of the tail of the car before track season.
The Soul Trackback exhaust is the lightest setup I could find as it deletes the entire muffler. I wanted to retain catalytic converters, so I got the setup as seen above. By “as seen above,” I mean the exact hardware in that picture is current hanging under my car! Soul says the catless version drops 27lbs over stock, and I bet this one drops ~22lbs or so. I don’t daily the car and really only use it for weekend fun and track days, so I’m willing to compromise and accept some drone.
Removing the stock exhaust isn’t hard, but the stock cats and muffler are heavy and cumbersome. A second pair of hands or a jack help a lot. Also, I suggest removing the rear fender liners to get easy access to some tough-to-reach heat shield bolts. Install is a piece of cake. I did use new gaskets though Soul said the stock ones can be reused. I used the stock flanged nut on the stock turbo stud but used the Soul-provided bolts, nuts, and washers on the other 6 holes. The bracket that holds the stock muffler is used to holds the L-shaped pipes, and I did bend both sides of the bracket slightly so that the L-shape part coupled with the cat part without having to push parts into place.
How’s it sound? ROWDY. For some reason it’s louder Normal and Sport than in Sport+. I typically use rev-matching on the track, and I don’t like the synthetic burbles, so I’ll likely keep the car in Sport+ most of the time. I have no CELs so it seems the cats are doing their job.
The test conditions are terrible as we’ve got howling winds today and I’m using an iPhone in the cupholder . At top speed, I’ve got wind buffeting at an airspeed of about 130mph-140mph which completely drowns out the exhaust, but you can really hear it rip in 1st and 2nd:
It absolutely SINGS at 7000rpm. There are definitely more awesome turbo sounds at lower RPM as well. Does it drone? A little bit, as expected, but really only around 2000 +/- a few hundred RPM. At 65mph I heard as much road noise as wind noise as exhaust noise. There was no drone in 7th gear at 65mph, but wonder if I’ll hear it at a more-realistic 75-85mph. More testing to come.
I’m very happy with this setup and look forward to tracking the hell out of it this season.
thesaintusa (Rennlist) –
Currently running the Soul Trackback with high flow cats and low it.
My neighbors don’t love it.
But I don’t care.
My wife loves it and says it sounds like a proper car now.