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The answer to this question will vary depending on what you are looking to do.
The side muffler delete is a great modification to save weight, but will only effect the exhaust tone when your PSE valves are closed. When your PSE is activated, you are already bypass the side mufflers.
The center muffler delete is where you will see real gains in the exhaust tone. When the valves are open, your exhaust is essentially a straight pipe from the headers back. When your valves are closed, you will still get the function of the side mufflers to quiet the car down a bit.
If you are only going to do one or the other - go with the center muffler bypass. If you are looking for maximum performance and sound increase, go for both. If you have any questions, please feel free to reach out!
Every Fabspeed I've driven or ridden in has drone. period.
Care to share which vehicles specifically exhibited drone? - Just curious.
Originally Posted by GotBoost?
+1. Had fabspeeds on my 996tt and it was drone city.. I don't know if the new systems have addressed it.
Did you have a muffled system or a straight pipe system?
Drone is a subjective characteristic, it cannot be measured like sound can be measured in dB. That being said, what I might think drones, you may not - and vice versa. A straight piped system (shown in the photo) is more susceptible to drone in a situation where you would be lugging the car around at a low constant RPM. If you are doing a full muffler bypass system, chances are that this is a track car, where you will be on the pipe and high in the RPMs the entire time.
Care to share which vehicles specifically exhibited drone? - Just curious.
Did you have a muffled system or a straight pipe system?
Drone is a subjective characteristic, it cannot be measured like sound can be measured in dB. That being said, what I might think drones, you may not - and vice versa. A straight piped system (shown in the photo) is more susceptible to drone in a situation where you would be lugging the car around at a low constant RPM. If you are doing a full muffler bypass system, chances are that this is a track car, where you will be on the pipe and high in the RPMs the entire time.
Mine was a muffled system. I understand that drone can be subjective and different for everyone. However, when everyone that rides in your car makes a comment about how bad the drone is, it's beyond being subjective. It was particularly bad at freeway cruising speeds. I found myself driving in lower gears on the freeway to keep the revs higher just to keep it from droning. Outside of the drone issue, the exhaust note at WOT was good and made good power with a tune. Not trying to bash your products. Just some feedback on what can be improved.
Would want to see the Dyno….never heard of an exhaust only adding 25HP….even a flash usually only adds 15 HP. Sorry call me Mr Missouri, but gonna need to see the dyno….
Love my Sharkwerks and have heard on 997.2 and 4.0 RS. All sound good to me and have the switch to go back and forth. Good luck with your decision.
Originally Posted by houstonGT2
Ross- Thanks for your nice overview. A friend in Houston has the Brombacher exhaust system and is very happy with it. In addition to getting the cup car sound, it adds 25+ HP and torque plus shaves 45 pounds off the back. This is the lead horse for me as of now.
