So, I'm looking to upgrade my exhaust system. I'd love it loud but not at all times so an adjustable solution would be preferable. The factory PSE is way to expensive so that's not an option. Some companies make systems that will go from loud to quiet at the flick of a switch, but not for the 996. I've emailed Fister about doing an exchange muffler combined with something like this: QTP - Quick Time electric cutouts:



With an OEM switch instead:




Fister had no plans on adding valves but perhaps someone else do? Tips would be appreciated.

 

I looked into it. Unfortunately, that solution is not reliable, as the flaps are operated by an electric engine, which ultimately will fail.

 

I googled around regarding the QTP-products and didn't find any complaints that they break down. If that was a problem I'm sure they would have made a v2.0 with a better motor

 

why would this brake down?btw for $175 is worth to try

 

I agree! However, my welding skills are non-existant so I need a bolt on solution and it baffles me that it doesn't appear to exist...

 

Actually there are complaints about failures. Probably is exaggerated as usually happens online. However, there is a reason that all decent systems use vacuum valves, including oem and aftermarket systems.

 

Hmm,.. Interesting idea,.. but really,.. the electric motors don't bother me,.. on My land Cruiser I have electric locking differentials (Factory) with over 330k miles,.. dragged through mud,.. water, road salt etc., without cleaning, and they have yet to fail me.

I would imagine, you could simply get these to work as a bolt on with welding slip-pipes to each end and then slipping/clampingg them over the exhaust pipes in the cars... but would you need two off them? one for each side?

 

Yeah, you would need to valves. I was thinking an easy pipe that bypasses the muffler, with the electronic valve in-between.

 

I thought Fabspeed made an adjustable system for the 996...

 

Correct... with vacuum valves. You wonder why they did not go the inexpensive route if it works the same...

 

It still uses an electric motor to open/close the exhaust. The difference being that in the Fabspeed kit it's an electric vacuum-valve instead of a motor moving the flap directly. The heat of the exhaust might reduce the life of the motor, but then again, the vacuum-controlled-flap probably isn't too keen on heat either. On cars without FlyByWire throttle the system won't automatically open the exhaust when you floor it. Not that it matters to me though.

Only problem is the asking price: 2100 usd...

 

I thought about doing exactly this but upon further research, electric motors+heat+carbon deposits doesn't make for a good reliable long term solution.

I've also thought about exactly when I would actually hit the quiet button which would be very seldom considering any exhaust that is similar to any fister style would be quiet any ways if revs are kept down.

 

I thought the valve itself was a vacuum valve, no electric parts. Regarding heat, well yes, they all need a heat shield, you can see in pics.

 

The Fabspeed system has a remote keyfob, the Porsche PSE system has a console switch. Both have a vacuum-controlled exhaust valve, so both require some point where electricity meets vacuum. The Fabspeed one use electronic vacuum valves and I would guess the PSE uses it as well, but I haven't checked the schematics. Note that the vacuum-valve doesn't have to have the same location as the exhaust-valve. So the electric vacuum valve can be kept away from the heat of the exhaust.

 

You are right, i was referring to the valve that controls the flap. Bty, I was the one that offered to check the xenon self leveling in renntech... different name lol