jmartpr

The COBB AP wont work on the 718 GT4, at least that's the latest info from COBB...there are other ways around a CEL but if you have visual inspection then it becomes a bit more complicated.

jmartpr

On the OAP, if they are designed with a single tube going into a Y split (like Fabspeed, Akra and Soul) they should all sound the same....go with the best construction quality and/or price.
Now...if they add resonators or move the cats there then sound will definitely change.

palmpalm

I had them installed at the same time so can't say.

palmpalm

Thanks. I. purchased mine directly through JCR in England, corresponded by email directly with Jonny through his website. He is on here as a sponsor too.

tdlondon

I have just this mod for now, still OEM muffler. It sounds much better than OEM, louder for sure. But as there is no mixing of gas in the muffler, you amplify the sound of 2x 3 cylinders. So I am strongly considering a SOUL or Fabspeed rear valved muffler to address that.

MEM82

Yup that's what I read as well. I spoke with cobb customer service a month or two back..I will do a spacer

Fabspeed Motorsport

Check out our new video showcasing the sound and power of our 718 GT4 System!

Featuring our Valvetronic Exhaust, Sport Headers, and GPF Delete.

Porsche444

I thought about doing headers, exhaust and OAP, so I figured I would start with the easiest item, OAP, and I went with Soul, $1795, and I think it's awesome. Sounds sooooo much better, just love it, so now now not sure if I need the rest. I think I would of do heaters and exhaust if I need more power, took car to Streets of Willow Springs and car sounded and felt phenomenal.

alwaysdriving

went with Akra over axles (because of heat sheilding + its titanium)
Soul catless headers in white lightneing coats by Swaintech with o2 spacers (which to be honest was useless to add spacers as CEL will appear no matter what even after reflashing)
power bump , sound was X2 and weight was lowered overall and power when crossing the 5k every time you would never miss the stock setup + it has ZERO DRONE and not loud to unless you throttle pass the 4k i would think the oem catback did hold and bottle necking it. But will see soon by how much.
Next week in for the valved x Exhaust by soul + their valves bypass controller to finish my final setup.
Soul did a fantastic job with the design of headers and the coating did make a big difference since i track 80% of the time of the cars life. The sound is near obssessed garage full setup but lower volume and has high pitch in comparison (which will be corrected soon). I think it will be a perfect after the catback.





PS, the akra in the pic wasn’t installed fully which some people might notice the vacume plug and the bracket nut isn’t installed which it is but not on the time i pictured it while installation

mos996tt

Soul OAP and valve controller. Stock exhaust does get louder after a few thousand miles . Installed valve controller first...when open, kind of drone-y. But with oap, get more throaty sound/better tone and burbles/farts - can actually hear engine when you downshift and rev match (not as burbly as 981, but definitely more fun to listen to). Not cheap but worth it for what I was looking for. No need for me to go full exhaust replacement.

mr965

Dundon. nuff said.

usctrojanGT3

I have a Soul race exhaust on order and thinking of getting either catted or non-catted Cargraphic headers.

Porsche444

I'm curious, doesn't the Dundon cost like what, $18K or so installed? What you get out of it for weight, HP and does it remove the cats, making it no longer passable for california smog checks?

jmartpr

Come on...you know you want the race headers!

usctrojanGT3

Gotta see how loud the race exhaust is before I pull the trigger on the headers. I'm not putting anything on the Gentian Blue car as I'll be selling it in a few months, all the mods will go on the PTS car.