Porsche 718 GT4 / Spyder / GTS 4.0L SOUL Competition Over Axle Pipes

Previously, their full "Race Rear Section" came with their own OAPs that only had a single outlet to connect to the rear section. This new rear section is more modular and plug & play with any standard dual OAP design (which is basically all of them). I had the first one off made for this rear section after getting in contact with John and if it would be possible. John was amazing to work with and happy to try out this new exhaust component for me! After receiving the product, the quality was perfect, as I've experienced with my previous SOUL exhausts. I initially had the rear section only installed, keep all other parts stock. Even with the stock OAPs, this rear section sounded amazing. It had that perfect higher pitch tone that was missing from the stock exhaust, and it also made it sound good all the time, due to removing the useless valves that are always closed below 4k. It had a much bigger difference than I expected since I thought the OAPs would quiet it down and muffle the sound - not the case. Rear section only is a GREAT option for lots of people that don't want a very loud system. The next step was to install OAPs to go with it. Oh man, the sound is PERFECT now. Just the right amount of loudness for me, and the tone is exactly what I wanted. I've given passenger rides to many other friends with the 4.0 motor, and every single one of them walks out with a huge smile on their face and wants the exact same setup I have! They couldn't believe the night/day difference an exhaust makes to feel of the entire car. The only issue is drone between 2-3k which is easily avoided with my driving style. If you like to do lots of cruising, this may not be for your. I'm totally with it even at highways speeds. I've also got PDK so that extra gear helps, and I don't mind keeping the motor at 3k or 4k at all times. If you use the automatic shifting and keep it in normal/sport mode, you will not like the drone. If you drive in manual mode which I do 100% of the time, I honestly have 0 issues with it!

I had my local shop install the Soul OAP and valve controller for my CGTS 4.0 about 1k miles ago. I absolutely love it. I would say around 30% louder. It does bring out a more raw metallic tone which I like. Under light load/normal driving you'll hear subtle burbles during shifts or when letting off the throttle. Under heavy load, it absolutely screams and sometimes produces a loud bang/pop when shifting. For me, I wouldn't want the exhaust sounding any louder. It may be phycological but I want to say there was a noticeable bump in power. I would suggest the valve controller. The reason why I installed it was so that I can hear the exhaust note without having to rev up the engine past 4k rpm. Switch to stealth mode and close the valves, the engine itself is louder than the exhaust.

Just wanted to give an update to people who may be thinking of gaining more power and making their cars sound better. It was hard for me to find this info so I’m excited to share. Just added over axle pipe from soul performance and bmc filters to my 718 already street headers with cats. And WOOOOWW very noticeable difference in power and the car sounds incredible now! Really happy with the gains all around.

The Soul OAPs with the OEM Muffler sounds terrific. A Valve Controller is a MUST HAVE with that setup, IMO. The PSE logic is so frustrating and annoying, as the difference between valves shut and valves open is so big. The difference becomes much bigger with the OAPs installed. So it is much better with the Valves open all the time for spirited driving, shut them in the neighborhood or wherever else you want to keep a low profile. I have almost 8K miles on my Cayman GTS 4.0 now, and about 6K of those miles are with that setup, so I have a lot of experience with that setup in a lot of different driving scenarios, with the Soul OAPs, the Soul VC and the Stock PSE. I think that is a great "value" setup, at half the price or less of an exhaust upgrade. Based on my experience, I recommend it very highly, especially for those not wanting to spend a lot of money on exhaust upgrades.

I had Soul OAP's and value controller installed on my CGTS 4.0 on Friday. First impression? Well, some background first. I traded my 981 CS on the new CGTS 4.0. I was running Fabspeed sport headers and their Valvetronic exhaust. Wanna talk about LOUD when the valves were open... that car screamed. It also had a significant amount of drone, but I lived with it because the car sounded glorious. The wife, however, was not as enthused as I was... she thought it was obnoxious. The CGTS 4.0 with the Soul modifications is very different. First, with valves open the sound pitch is much lower than my modified CS. Its a lower, rumbly growl that gets louder and higher pitched as you open up the throttle. It sounds both sporty and aggressive. Second, the volume is not nearly as loud as my CS was, but it is significantly louder than stock... removing the particulate filters brings the exhaust to life. I had my friend drive my car at about 50 mph while I stood along the side of the road. It was noticeably louder than other cars that drove by. I was impressed with the volume... and it also got my wife's begrudging approval. Lastly, I know folks are concerned about drone. I get it. I lived with drone in my CS for 4 years. IMO, this Soul set up does not have significant, if any, noticeable drone. The sound in the cabin is louder and lower, but it did not resonate. Looking for a real increase in exhaust note quality and volume without being obnoxious or having to live with annoying drone? This Soul set up is a great option. You can always do more later if you want a different exhaust note or more volume... but this is a good first step.

LOVE the way my car sounds with just the Soul OAPs on there, everything else stock. Sounds like a refined sports car, just what I wanted. Nice crackles when on/off the gas at each shift. Minor drone with valves open at around 3500-4000 RPM, easily quieted by closing valves. Sounds badass without being obnoxious as a street car.

Just installed the Soul Performance Competition Over Axle Pipe ..... sounds amazing ... at 4800 rpm it howls .... best money I have ever spent on any exhaust upgrade

As per usual SOUL delivers! Over Axle Pipes have completely and positively transformed the GT4 with drastically improved sound and I believe more punch to it now. Also ordered the Valve Controller but don't think I'll install until I do the rear section. Simply disconnected the factory valves and added the OAP's.... couldn't be happier (for the moment).

If there's one thing I didn't like about the GT4 is the sound, its just a bit whiny. So, after doing research and picking the best in the industry, I had these installed on Dec 30th and managed to put about 250 mountain carving spirited miles on the car and just WOW!!! At startup, you can just hear the difference, gotta be 30-40% louder and once you hit about 4k+ rpm, this car sounds SO DAMN GLORIOUS!!!!, its is the icing on the cake. Its so much deeper/richer with sound now, its now crackling/popping and making sounds it didn't before, so it released something within the beast. And i'm not sure if its my mind playing tricks, but i swear it has increased the torque by 10-20, because the car feels faster, just has that extra little punch. Cant say enough good things about John Gaydos at SOUL, shout out to him and his amazing team, thanks John!!

Just picked up the GT4 from having the Soul OAPs installed. Loving it so far. So much better than stock. Now I can’t go under an overpass without revving the piss out of it. LOL!