The default for the PSE is for the valves to be open, louder. If you wire the valve plungers down you will be closing the valves making it quieter. I have verified this with a cable camera. If you add a PSE to you Boxster just leave it as it is for a louder note. Again, IMHO, the PSE look great but are lacking in sound.

I could've sworn I read a post before on Renntech where a guy wired his PSE valves so that they wouldn't close, but I defer to you since you have one. :cheers:

Then I definitely need a new muffler. This thing is quieter than my FJ. I run around with a bunch of air cooled 911's and I cant even tell if my engine is running or not without looking at the tach!

Something is wrong with your valves (either stuck or getting constant vacuum).

Thanks, now i have something to do tomorrow

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Care to expand on the topic?

This advice could've saved me concerns on a PSE months ago; I'll keep that in mind in my next opportunity for a PSE

Thanks!

If you want a PSE system, that requires the control system or a dash switch, wiring and vacuum lines. If you're only interested in the increase in sound provided by the bypass pipes, why spend close to or more than $1000?
Better to just buy the $100 bypass pipes in the link I provided and pay a welder or exhaust shop $50 to weld them on for you. ;)

+1 on the bypass pipes. I used the Pedro method.

Awesome sound when you get on the throttle. However, I'm not crazy about the sound at low rpm. Not sure how to describe it...sounds a little too much like an old Rambler with a blown out muffler. I think the PSE solves that issue with the valving.

If I had to do it all over again, I would just send it off to Fister and have them do it.

Yes, Pedro hacked PSEs at idle sound like you have a broken muffler. The real PSEs don't do this for some reason. Also, I think the small pipes used to do the hack, if left visible from the rear, look like plumbing pipe not really fitting for a Porsche. Does sound much better at throttle though.

Bypass pipe diameter is a factor.

I used a larger pipe than Pedro, 1.5 inch -- much better appearance. Then I had my shop ceramic coat the whole catback assembly.

Fister does an additional modification to their retrofits which resolves the broken muffler sound issue at low RPMs. Not sure what they do...suspect they weld in a baffle at some point.

That's why your sound doesn't sound great at low revs. Mine has 1" pipes and the sound is very refined. Sounds quite close to a 981 with a sports exhaust - my boss has one.

Thanks for posting that. I have always wondered about the switch.

Anyone seen a pipe bypass done on a base single tip exhaust? Where would you weld the pipes to make them look even half way decent?

Do a google image search for "Porsche 986 muffler bypass". Tons of pictures and yes, it looks fine. ;)

Like this.....

http://www.oettle-tuning.de/WebRoot/...4/986-25-1.JPG