Originally Posted by Westcoast

Although I am not a track rat, I do get there perhaps 6-8 times per year, I have been running the Akra Titanium link pipes and JCR Titanium Silenced Valved Race Pipe for almost 2 years, so far no cracks...

Originally Posted by jmartpr

Most muffled system end up in disappointment when you swap for headers and OAP, even if you keep the cats on the header or on the OAP. Been there, done that....
The JCR is not muffled, it just has resonators and some like the Akra just dump each side individually once you open the valves, it's a glorified OEM muffler and IMHO with a very Un-Porsche sound.
BTW Ti tends to crack, the Akra I tested developed a crack right in the middle (was exchanged in warranty)...I do use my cars at the track. Ti doesn't like too many heat cycles, just ask the people with OEM GT3RS ti mufflers.
And at +$10K I would prefer Inconel by far.......I'm pretty sure Dundon has done their R&D after seeing all the problems with these mufflers (OEM and aftermarket). The other one I would say also has lots of R&D is the Soul valved for the GT4RS, that one I will be able to provide some feedback this week.

Originally Posted by BabyNSX

Great information, thanks for posting.

I believe Dundon will be developing both TI and SS versions of their mufflers although I'm not sure if Inconel is being considered. I would prefer Inconel over SS, but am wondering where the Ti pricing will finally land.

Originally Posted by Avera

The only point of reference I can verify is Dundon clip where it was stated they have seen titanium exhausts (pl.) literally fall apart in one track setting due to high temps. I am assuming the reference was to a Porsche model given that is Dundon's focus.

I am sure there are other reports of the same out there? It will be interesting to see if Dundon does NOT recommend their titanium rear box for trackers, rather, only for street use?

Avera

Originally Posted by ForwardUntoDawn

Hey there, reviving this thread as I have a new GT4 coming in soon.

I've tried my best to search for an answer to this but it's proving to be difficult:
Coming from a stock 981 GTS with PSE, how does a 718 GT4 compare PURELY IN VOLUME, if it has something like a Soul OAP + valved catback? I am assuming with the 718 platform that an OAP + catback will sound similar in volume to a 981+PSE because 981 OAPs were unfiltered to begin with?

Thanks!

Originally Posted by BrewKaiser

My friend has a 981 Spyder. When I picked up my 718 Spyder we swapped cars and went for a drive. Only after 5000 RPM does stock exhaust come alive, but still more modest than stock 981.

I then added valve controller, swapped OAPs (Flat6) and added JCR Ti non-Silenced. It was transformative. The OPF delete with the new OAP might be all you need to get the burbles of a 981.

The non-silenced JCRs while glorious (esp 6k plus) are LOUD.

Start with OAPs, but do get ones with heat shielding. You can always build from there. I bought my JCR used. Exhausts do come up in marketplace here and Rennlist. Also recommend plugging valve vacuum lines as a quick and free way for you to tell difference with valves open vs closed in the 2.5-4.5k range

Bottom line, the anemic exhaust of the 718 is its only flaw.

Originally Posted by shiftgear

is your setup crazy loud?
I have jcr non silenced with stock oap and find it not loud enough

Originally Posted by BrewKaiser

Depends what your definition of “crazy” is .
It’s loud but can be driven reasonably. It has changed my driving behavior to where I intentionally try to get pops, cracks, and wild banshee. I also bring the radar along more now not because of speed but to alert of potential law enforcement and tone down driving accordingly.

Every post I have read on these forums concerning exhaust has a bias towards the commenter’s chosen solution(s) and personal preference. Start with the OAP and then keep adding more cowbell as needed. The OAPs (OPF Filter) really is what’s holding the exhaust back. Different exhausts are what fine tune the tone

My set up is almost straight piped. I love it. Wife does not. This makes me love it even more

Originally Posted by BrewKaiser

My friend has a 981 Spyder. When I picked up my 718 Spyder we swapped cars and went for a drive. Only after 5000 RPM does stock exhaust come alive, but still more modest than stock 981.

I then added valve controller, swapped OAPs (Flat6) and added JCR Ti non-Silenced. It was transformative. The OPF delete with the new OAP might be all you need to get the burbles of a 981.

The non-silenced JCRs while glorious (esp 6k plus) are LOUD.

Start with OAPs, but do get ones with heat shielding. You can always build from there. I bought my JCR used. Exhausts do come up in marketplace here and 718Forum.com. Also recommend plugging valve vacuum lines as a quick and free way for you to tell difference with valves open vs closed in the 2.5-4.5k range

Bottom line, the anemic stock exhaust of the 718 is its only flaw.

Originally Posted by ForwardUntoDawn

I'll likely get the Soul set with resonated OAP and the valved exhaust. I'm just hoping it's roughly the same volume as my 981 is now. I guess if it ends up being too loud I can always put the GPFs back on. Thanks!

Originally Posted by ForwardUntoDawn

Hey there, reviving this thread as I have a new GT4 coming in soon.

I've tried my best to search for an answer to this but it's proving to be difficult:
Coming from a stock 981 GTS with PSE, how does a 718 GT4 compare PURELY IN VOLUME, if it has something like a Soul OAP + valved catback? I am assuming with the 718 platform that an OAP + catback will sound similar in volume to a 981+PSE because 981 OAPs were unfiltered to begin with?

Thanks!