Driving The GT4 With The New Soul Performance Over Axle Pipe

The stupid Go-Pro Mic didn't work again, but I do go out for a drive. Now that the exhaust is installed, it's time to get a feel for what it sounds like in the car. First impressions are that it's a huge improvement over stock and makes a good bit of noise without being super drone-y. This will be a good setup to hold me over till the next Soul Performance exhaust shows up.
View All OG Products Here:
www.obsessedgarage.com/
For more insight into my life and business become a member of Inside the Hex: www.obsessedgarage.com/pages/...
Join Our Closed Facebook Group of Like-Minded Obsessed People: / obsessedgarage
Website: www.obsessedgarage.com
Podcast: obsessedgarage.com/podcast/
Facebook: / obsessedgarage
Instagram: / obsessedgarage
Everything Else I Use That We Don't Have At OG:
www.amazon.com/shop/obsessedg...
Stay tuned for more crazy!

[@okanelkin]

I don’t think straight pipes refers to there being no curves. I’ve always considered it to mean no cats/resonators/mufflers.

[@gopletkarmah2639]

I find it funny he thinks it means a literal straight pipe lmao

[@ObsessedGarage]

On muscle cars back in the day it literally meant you would take a straight piece of pipe and run it back from the headers with no resonator or cats. Now everyone with an after market exhaust says the straight piped the car.

[@markz7635]

They still had bends bc of gas tank, diff, axle etc. I know what you mean by the rear/mid engines having lots of curves, but straight pipes mean straight out the back with no resistance (cats). 🙂

[@BreezeLock]

@Richard Long He had a GT350 not long ago

[@XcoolcoolbeansbeansX]

@@ObsessedGarage Frankly anybody with no cats, resonators, or mufflers is “straight piped”. I love your content, but I’m gonna have to say you are wrong on this one, sorry.

[@joetacchino4470]

Matt: “Anyone who complains about the gears being too long is an idiot.” Also Matt: “Gee, it’s hard to get to redline with these gears. Top of third is like 100”. It’s a shame that the gears are as long as they are. In theory, they allow you to drive long stretches with very little shifting. And the powerband is significantly wide to not have to shift often. But with an engine that sweet, you just WANT to wring it out, and with the gearing as is, you can only do that twice, three times on the highway. It’s a shame. Definitely doesn’t ruin the car, but a shame nonetheless. Was the biggest frustration with my 991.1 C2S. That was even worse with the 7 speed manual. You could cruise the highway in 5th. Car sounds good, but I agree, a little more amplitude would be welcome. Also, with the heel / toe, I’m size 13 and have duck feet. My “heel-toe” is more like “left forefoot brake, roll ankle right, right forefoot stab gas. I installed the Rennline adjustable throttle pedal which has a bunch of adjustment and it really, really helped. I found the pedal extension on top was too much as I would hit the gas while braking, but the extension on the bottom and the top pad out slightly worked great.

[@rekt_86]

The gears are definitely too long, they make a shorter final drive that will help significantly, but that also means 6th gear on the highway will suffer.

[@tigerbiterhater]

Shoutout to Porsche for still offering manual transmissions. Autos sure is faster, but nothing beats that manual shifts and feelings. Plus it just completes the interior looks.

[@PapierkorbEric]

OPF stands for Ottopartikelfilter. It is basically a filter out of an highly porous ceramic component, which will stop a big part of the carbon output to flow out of the exhaust.

[@evergreenenduro]

Wow that sounds insane! Such a different sound to the GT3. Sounds like a good compromise right now between comfort and sporty sound too.

[@Strattos4]

So glad you went with the manual, and sounds great.

[@mik3ymomo]

Thanks for sharing the car and your experience with us.

[@rhsab1]

Awesome sound Matt!

[@ErnstDetailing]

I can't stop watching your content. Good stuff sir.

[@AncientAviator]

Great video Matt! Love the discussion regarding where you started and where you are now with the mods. Keep up the great work!

[@niroshnalenthiran9308]

Looking forward to the GT3RS comparison video. The GT4 is the perfect size. 991 and now the 992 are just getting way too big.

[@SoulPerformanceProducts]

The master at work! Thank you for making another great video. -Mike

[@KVX21]

Sounds like a Work of Art!! Enjoy that Machine.. Love the Color

[@denisbarry9436]

I got the exact same setup in my 718 GT4, lovin it

[@Mozeyzey]

The amount of content has been awesome! Love it and keep it coming!!!!

[@ObsessedGarage]

Thanks man.

[@rubioalejo]

Sounds amazing !!!!!!!

[@Deagles456]

Yeah buddy!!! Sounds insanely good!!!

[@gamerscockpit]

Great to see you actually driving the car.

[@NellenTV]

wow ! what an amazing beautiful machine. and his new sound is captivating ... wonderful Porsche

[@panthers865]

“Stop using your baby feet; grow some man feet and heel-toe like a real man!” That’s my made-up Matt-ism for the day lol

[@Villajesse]

That uplift at 6:48, sounds soo good.

[@timc4370]

Matt the OPF on EU 718 GT4's are activated, they have sensors and are monitored. The OPF in US are not, no sensors.

[@gjodexter]

Sounds great. Straight pipe means, no flow obstruction from headers back. My ZL1 has a muffler with valves but headers and no cats. It’s not straight pipped.

[@VikasGiri1986]

This makes it sound like Matt has a lisp. Love it

[@mattyp3119]

Try capristo one of these days on your cars, I've never heard anything quite as good, having been around a lot of porsche gt4s, Cayman etc.. capristo makes the most musical, non drone, perfect loudness especially on the valved versions. Glad you didn't go with total crap like fabspeed, soul is fine you'll likely be happy with it glad to see you doing the exhaust again it's so needed.

[@JBOsurf]

Once you've had your fun with the 718, sell it, buy a 981, install a deman 4.5L conversion, short ratio gearbox, lightened flywheel, dundon intake runners, headers and exhaust, tune. Document it on KZbin. Happy days!

[@matthewgloberman3682]

Sharkworks short gearing set is a must for this car.

[@ccwnyc5671]

I'd want the valve switch in case the Rozzers pull you over with a dB meter in hand. Maybe not in FL, but happens in CA.

[@mranonymous1167]

Sounds great !!! I have my heart set on a GT3 or if I can be more patient a GT3 RS.

[@TheCarDetailingChannel]

That is a heck of a sweet car man! My one day car is a Porsche 911 Turbo S

[@cartergarnon6299]

Porsche says the cans are (obviously) in there but the stuff between the screens you can see when you look inside is not. You’d have to weigh them or cut them open to see what’s true.

[@ninerfour]

I'll be looking forward for the comparison between the two Porsches as I'm sure it's going to be a very interesting chat!

[@richardmesser1091]

I can tell you how it ends, one is more expensive and goes faster

[@ninerfour]

​@@richardmesser1091 That's the obvious but I want to hear it the OG way.

[@mjack70]

Sound is definitely always on now, with good feedback. Is that because the valves are open now, or the exhaust, I wonder.

[@ObsessedGarage]

The valves are fixed in the open position.

[@cr4zym3x1c4n]

I need this car in my life

[@gbass7328]

I had a Formula Ford driving course 25yrs ago where they made you drive in and out of the pits and on the front stretch going up and then down the gears around and around many times. Find a big parking lot or deserted road you can repeat 1-2-3-4, 4-3-2-1 with heel-toe over and over. It doesn't have to be extreme rpms. Then call us in the morning like a doctor and report back......

[@DylanTK]

hubcentric spacers are the answer

[@taforth]

“...the GT3 is the GT3...” 👍😎!

[@shaggypeach]

Nice

[@w75525]

Can you tweak the mic gain at all? I can't really make out what you're saying inside the car because of the exhaust noise.

[@ittotaq]

his audio is all over the place. sometimes its set wayyy too high and sometimes its like this

[@ObsessedGarage]

My audio is not all over the place. I'm pretty sure my mic adapter is toast. The last video I did in the Civic was with the new Hero 9, that apparently doesn't work with an external mic. This one was back on the Hero 7, and the mic didn't work.

[@AJBAF]

Look into the company VAREX they make super quality valved exhaust and you'd be able to open and close your valves via a remote. Did it to my car and love it.

[@LacerdaRafael]

hey matt! so, particulate matter refers to a mix of solid and liquid particles that may be suspended in the air or exhaust gases, and what people say is that it may be one of the main causes of pollution and intensification of the greenhouse efect. particulate filters have been very common in diesel engines for a while, and they started using it in the gasoline direct injection engines due to the new european emission standards. so basically, they're a filter that remains closer to the engine, thus hotter, and this heat combined with some substances of the OPF are responsible to reduce hydrocarbons molecules, nitrous oxides (NOx) and carbon monoxide that are produced during the fuel combustion into small amounts of carbon dioxide, nitrogen and water.

[@gbass7328]

Heel - Toe is definitely a cool tool to know how to do. I find it harder to do on the street when there is no urgency. Maybe that's an issue for you too. On the track with huge braking and deceleration happening you just rock thru the motions and Walla, it happens just like the OE program. Practice without the engine running for foot position and coordination, then on the street without the braking component to see how much throttle to apply. Then put it together on the street slowly and then somewhere you can decel fast to try a track simulation. Let us know. It takes practice.....

[@ltfl09]

Matt you think about Numeric short shifter & cables yet? I did mine

[@sudeshseeram6355]

Am getting the feeling that you will just keep the gt3rs just to know that u have it , i sense that this is going to be ur # one going forward...

[@StreetRiver]

How much louder is it on the outside?

[@ericgregory3005]

Have you ever thought of getting car scales to measure corner weights, suspension set up, etc..?

[@ObsessedGarage]

I'm sure I will get them at some point.

[@toddray275]

Looking Good Big Fella waist is trimming up!!!

[@lukek9694]

Matt do you think you would fit a GT3 RS bonnet to the GT4. Nice subtle lines on the bonnet and a bonus that it's Carbon fibre so quite a bit lighter than the stock bonnet.

[@ObsessedGarage]

I don't think it will.

[@jeffreykilpatrick3592]

Do you get backfire sounds when downshifting like on a 911 in sport mode?

[@TRZ0612]

Maybe it was my home speakers, but with the valves open all the time, it came off as a little boomy when you were just cruising. That would annoy me to no end on the highway or freeway when cruising.

[@ObsessedGarage]

A lot of it is the Go Pro mic. I think my mic adapter is toast.

[@m3pilot86]

@@ObsessedGarage Did you specifically mic the exhaust, or is that all from the interior?

[@patspagnuolo2343]

A power washer that comes with a 1/4 inch hose is replaced with a 3/8 hose will pressure and water flow change and by how much

[@ObsessedGarage]

I measured no change.

[@Devon_Meadows]

Sounds like an air cooled porsche

[@Devon_Meadows]

@@behindthen0thing touche

[@chakadog100]

My face would hurt from smiling so much if i ever get to drive a Porsche with a manual trans!

[@vikd4292]

i like your long form real life videos... is this your favorite do you like it more than gt3? thinking about it hard

[@ObsessedGarage]

I still like the GT3 better, but this is pretty awesome.

[@LuisGonzalez-tj6mb]

Matt, how do you get your blend mount to be so stable? I know you mentioned one of yours jiggled or bounced. The one in my 981 Cayman S jiggles like crazy...

[@ObsessedGarage]

You may need to add some of those rubber supplied spacers to make it a little tighter.

[@kouki_integra]

Looks like you had more fun in the civic 😆

[@blraider9724]

Well damn... This video just cost me $1800. Need that sound on my GT4 now!

[@SoulPerformanceProducts]

Cheers! :) -Mike

[@blraider9724]

Soul Performance Products how deep is the backlog on the OAPs?

[@SoulPerformanceProducts]

@@blraider9724 our lead time right now is 6-9 weeks but we have dealers expecting some coming through the pipeline sooner than that. Reach out to us as [e-mail] and we can take care of you. - Mike

[@2of2DCH]

Going to do the DSC suspension controller thingamahjig on this one too?

[@ObsessedGarage]

Yep, as soon as they release it.

[@tdlaustralia7791]

My feet are just too big for any heel toe, rev match would be great.

[@gabrielarch5242]

Any thoughts about a dsc sport control install. Seems you had good things to say about that before?

[@ObsessedGarage]

They don't have it for this car just yet.

[@gabrielarch5242]

Ah, ha! And when they do?🙏🏻

[@taforth]

I guess the exhaust modification is making it more difficult to hear what you’re saying 😉. Is it me, or at lower RPMs does it sound like an ‘80s 911 Turbo 🤔?

[@ObsessedGarage]

The mic wasn't working.

[@taforth]

@@ObsessedGarage NP - I guess I’m just used to nothing but the best quality from you 😉!

[@tonymcflattie2450]

Only car I could heel toe was the skip barber formula car. Those pedals are spaced close.

[@tonymcflattie2450]

@Richard Long plus it has auto blipper. Which is real nice

[@tonymcflattie2450]

@Richard Long all be current gen, v8 camaros have the auto blipper. I really love that feature.

[@ricevw]

Matt - I couldn't heel-toe until I drove on a track and was forced to do it under hard braking. Found it impossible on the street with light city braking to manage throttle blips. Much more intuitive when driving harder believe it or not.

[@ObsessedGarage]

I've tried there too. Brain to foot just doesn't work, but I really need to work on it more. I should just go to a giant parking lot and do it.

[@pabloolivaalonso4406]

Why do I enjoy watching a guy driving and talking?

[@plife911]

I belive the active OPF is a version of the core you are seeing in yours but the matrix is further coated and the pores are a bit smaller. So its unacceptable with the valves connected, eh? Thats what John at SOUL said too..makes sense based on the valve logic. Why even run a muffler then? But a valve controller will be a decent option

[@TC-ts9rh]

Matt, will installing the OAP cause CEL?

[@ObsessedGarage]

No, there is no active monitoring on US cars.

[@kamrencatucci743]

Please keep the M3!

[@evanescent0311]

good info but kinda Doug demuro-like… 2 seconds at 80% throttle then “oh man.. it definitely feels quick” lol.

[@frank12777]

“Just straight pipe it bro”

[@ObsessedGarage]

Ha, ha... So dumb.

[@joetacchino4470]

Straight piped has SOOOOOOO much drone. Even with some resonators it’s can be horrible.

[@frank12777]

@@joetacchino4470 race car life yoo

[@Cawpbell215]

straight pipe has nothing to do with the direction of the pipe

[@ObsessedGarage]

Yes it does. Stop calling an aftermarket exhaust system straight piped. That's dumb.

[@jeffreykilpatrick3592]

Adding just this pipe does not disable the stock exhaust switch….

[@ObsessedGarage]

The exhaust button does next to nothing stock or modified. It only opens and closes the valves at idle.

[@yekaesh]

GT4 or a base 911?

[@Adam-eo5ff]

GT4 every single day

[@ObsessedGarage]

Yeah GT4.

[@paolasanchezd]

Straight piping is an aggressive form of deep throat oral sex. This is when a girl lays on her back on a bed (or some other object) and tilts her head back over the edge so her throat is no longer at an angle....Matt you agree with this definition? ;)

[@gallardo20000]

@4:40 the level of triggered I get when someone calls my honda a v4 engine

[@Dutch79]

"The stupid Go-Pro Mic didn't work again" > any idea for a solution yet? It's not great like this.

[@ObsessedGarage]

I've got to run some tests. I think the adapter is the problem.

[@colemank7753]

Check out Archie Hamilton racing. His friend has a straight pipe setup through JCR and it’s the best sound I’ve heard for a GT4. It’s amazing! You have a great sounding car as well, but go check it out. No disrespect, love your Porsche content. ✌️

[@ObsessedGarage]

I saw it. That car sounds like crap.

[@DylanTeeters2]

Actually first 🤙

[@lollypop9580]

Gt4 over gt3rs any day. 👍

[@jhrodriguez08]

Stock 981 GT4 sounds better

[@ObsessedGarage]

Agreed

[@KRBY555]

drone

[@ObsessedGarage]

Not really

[@308Doctor]

Тошнот...

[@LaughingLionMedia]

Audio is JUNK. You should take this video down. Very watchable. With the sound off. Call me Surprised.

[@ObsessedGarage]

I can't win them all.