Rennolazine

Havent seen this discussed yet. Theoretically should be like the speedster (and 718) where US only gets unmonitored, non coated OPF matrix. Any cleaning lady info?
I also dont see monitored particulate filter noted in Standard equipment on UK configurator. So we may not be able to tell from website tomorrow....

Nizer

Don't know and don't care. They've clearly got the car running strong and sounding great with them and even managed to drop weight from the exhaust system in the process.

AhsanU

I'm not sure but I doubt that USA cars will have any sort OPF/GPF. However, I hope @Jamie@dundonmotorsports and the team at Dundon get some exhaust goodies that bypass any sort of cats/OPF. I'm nabbing an RS this time around and can't wait to hear what Dundon comes up with. Hopefully they'll be the first to have a donor car to do research on when the 992 GT3 lands here in the USA. Not discounting other brands, of course, but Dundon did come up with the original design for the long tube headers for the 991 GT3.

subshooter

I agree with that.....but getting rid of the OPF and center muffler will make it stronger, sound better and weigh even less.

GrantG

Remember that there are no side mufflers, so getting rid of the center muffler is going to make your neighborhood sound like the Mulsanne Straight at Le Mans

Rennolazine

These cars have 6-800 cell cats and opf matrix (at a minimum). Ain gonna sound like a race car. My guess is 102-105 dB topps with a rear pipe and stock headers. Race cars are way over 130

Rennolazine

☝🏻💪🏻

GrantG

He said get rid of OPF's and center muffler (and I guess I assumed he meant cats too)...

subshooter

A close friend of mine has a 991.1 GT3 with sharkwerks exhaust. We go driving together a lot so I listen to it from an external perspective a couple times a month. It is the best sounding Porsche I've ever heard. That's the sound and db level I want in the 992 GT3. The OPFs are going to have to go. The designers and enthusiast didn't envision it that way......they are being forced to do it.

GrantG

Just remember that 991 has 3 mufflers stock (and retains 2 with Sharkwerks center bypass) and the 992 has 1...

I’ve heard a buddy’s 991.2 with Dundon race headers and center bypass (or maybe it was the loud Dundon center muffler) and it’s louder than a 991 Cup race car...

AllAboutThatP

I've got Dundon headers and loud center muffler on my 991.2 GT3RS and it sounds awesome. I'm even considering going louder and getting the crack pipe.

Yargk

Hey Grant, I missed the info on the mufflers, do you have a link about it? Does it still switch between loud and quiet? (Previously the valves were for the side mufflers, are they now valves internal to the one muffler?)

Edit: I see, like on the speedster (https://rennlist.com/forums/991-gt3-...l#post15788752)

I wonder if this affects how to get it quiet for Laguna.

GrantG

The new valves are internal to the muffler and are electronically controlled and infinitely variable (instead of the problematic binary vacuum controlled ones from 991).

Yargk

Thanks! The continuously variable part is quite interesting.

SToronto

I ran Akrapovic link pipes and slip-on race on my 991.2 GT3. Sounded epic and really suited the car. Lots of compliments at the track. But it was too loud for all the time, for me. Basically straight pipes cat back. Took out the link pipes and kept the slip-on race. Sounds better than stock but not as epic as with link pipes.

OPF housing does mute the exhaust. I know this from my Spyder. Before winter I replaced the OPf cans with Akra link pipes, sounds much better but adding the slip-on race centre when the weather improves. Difference on 718 is that it retains mufflers on the centre exhaust, so will be quieter than GT3.