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UncleDude

The modularity of this system is a both a blessing and a curse! That is an unusual set up your running, and I’m glad you felt some improvement with the valves open but as you say it is not a blended sound. For me the change in the sound was the most important aspect of changing / trying something not power or volume.

DC021

I’m on exhaust variant 8 for this platform now and think I may have found my huckleberry… I’ll have to get @alpha ice up here for a listen to make sure I’m sane.

Alan C.

I like my quiet/loud modification. No wiring, valve disconnects or plumbing. Just a simple press of a button on my hearing aids.🤣

aquintero610

hey, id be interested in the Akrapovic OAP if you still have this? I know this is from a bit back though.

SupremePower

Can get you into a new Akra OAP if you like.

We also have in stock currently KLINE OAP + Valvtronic rear sections in Stainless Steel as well as Inconel

Please email sales@supremepower.com and we would be happy to assist

cooler2442

Anyone tried running just race/competition headers with no cats? That was the magic move on the 981's where you keep the stock exhaust and its literally perfect below 3k while sounding like a cup car above 6k.

Alpha Ice

I'm not really thinking that this exhaust warrants it's own thread, but since it's also a combo of JCR Manifolds, factory OAPs, and Fabspeed valved rear, it doesn't really suit a specific manufacturer either. So I figure I'll just throw this here. Let me know if ya'll think there is a better spot for me to toss this. I did my best to properly capture some quality audio, I used a nice Sony condenser ECM-DS70P microphone plugged into my dslr to minimize potential signal quality loss (compared to running a Go Pro or a cell phone that might kill the quality). I exported this into Sony Vegas 19, chopped the video off, and edited the audio so you didn't have to listen to too much idling, but you could also hear some different sounds in the rev ranges. I didn't adjust the gain or anything in the audio, and made sure to export in FLAC so it's the best amount of lossless quality without cutting off different rev ranges. I had some rabbit feet or furry pieces that I was able to put around the mic's to minimize wind noise and used a lapel clip to fasten to one side of my license plate bracket. What you're hearing is about a foot or less from the exhaust tips, and there is a very distinct sound when the valves open and close with the Fabspeed setup, you'll notice when it hits up over 5k that you get a bit more buzzy noise as the valves switch from a nice mix of both banks to a direct output. I didn't get any noise from inside the cabin in this clip, I find with the windows down this is actually very tolerable around town at all ranges, but it can get a bit boomy/bassy with the windows up and in the lower rpm ranges from 1900-2500, and sounding good in the cabin above 2800ish rpms. I am currently running the factory valve operation, with the valves fully open the interior cabin noises are much better, but the exterior sound does take a bit of a hit.

I still very much prefer the so@DC021 current JCR setup, and I'm currently waiting for my catted, silenced lightweight exhaust to ship. Anytime Jonny can get some items back from heat shielding. Let me know your thoughts, it isn't perfect, it does have a good tone up to and around 5k, and from the driver seat it's not as obnoxious to me or buzzy as I hear. I have a good amount of 50-60mph roads and some 30 mph roads around, so it can be tough to get up to speed quickly/easily without other people being slow pokes.
718 JCR - Fabspeed exhaust
Here's an AAC link for iOS/Apple folks, it rendered in MP4 for some reason.
718 JCR - Fabspeed AAC

Alpha Ice

I did that, but I didn't like the sound. The factory exhaust sounds a bit tinny/hollow at the higher rpm ranges. It doesn't really mix the cylinder banks like most aftermarket systems, so it ends up sounding more like 2- 3 cylinder units vs a full 6 cylinder system. Unplugging the valves does provide good sound inside the cabin and outside, I just wanted a different tone. Not that Fabspeed has done it for me, but I do feel that it's a step up from the factory exhaust and there are some improvements in the butt dyno from running aftermarket manifolds and exhaust. I still have the factory OAPs, so I still have some limitations in the system of course.