Porsche 992 Exhaust Valve Mod Kit

Easy to fit, reversible, control your exhaust valve via an app!!

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992noise

The Kit

It's not complicated; it's just some wires. But it packs a punch!.

Easy To Fit

No specialist tools required.

Reversible

Remove in a few minutes without trace.

Make some noise!

More volume, more crackle, more fun!

No ECU Changes

Unplug an existing connector, plug in the kit and you're good to go.

Custom made

Assembled in the UK and shipped worldwide.

CarPlay

Use your iPhone and CarPlay to control the valves.

(images and videos above show the first generation kit which simply opened the valves permanently for 2019-2022 911's)

Testimonials

Shipped to US, UK and Europe, 992 owners have been kind enough to share their feedback after fitment.

Just installed the kit. It was dead simple.

.. just gave it some idle revs and it sounds great!

Definitely a more aggressive sound without being too loud.

Absolutely luved it :))

Very reasonable levels at start up revs before dropping down , then a lovely deep tone at tick over

Motorway driving absolutely fine , around town again absolutely fine.

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Compatible with all 992 models using the 2,981 cc or 3,745 cc turbo flat six engine.

NOT compatible with the non-turbo 3,996 cc engine - GT & S/T models.

Frequently Asked Questions

If they really are frequently asked, I put them here, alongside the other questions I think you might have ..

  • It only shows pre-order - why?

    The first version of this kit was very simple and worked well for owners of early cars (pre 2022) who wanted more noise all the time. However, it didn't work for some cars produced after 2022 or for anyone who wanted a bit more control over when the car was noisy and when it was quiet. The first version of the kit is no longer being sold and the new version is currently in development (January 2025). At this time, i'm taking preorders for the kit which are fully refundable (just email me if you want to leave the queue and get your money back) but will reserve you a place in the queue for automatic shipment when the kit is ready.

  • Isn't this just the same as pressing the PSE button on the dash?

    No - the PSE system includes an exhaust flap which may be closed even when the PSE button is pressed. Your car chooses whether to open the flap (and make more noise) depending on a bunch of parameters. At full throttle, high revs, etc. the flap is open. At idle, it's virtually closed. Driving around town, it's closed.

  • At high revs/full throttle, the sound is identical as, with or without this kit, the valve is open. The biggest difference is at idle and slower speeds around town - the car is throatier and there are more pops and bangs (even when in non-sport mode). However, on a trailing/closed throttle, the car remains very quiet.

  • Some cars use a vacuum pipe to control exhaust valves, the 992 controls them electronically - this mod ensures that the valve can stay open without causing errors on the dashboard. The 992 controls the exhaust sound at different rev levels, engine loads and modes by opening and closing a flap in the exhaust.

  • The configuration, flap setup and wiring is identical between PSE and non-PSE exhausts so you will also see a change in the sound of the vehicle with this modification.

  • The kit intercepts messages sent from the computer to the exhaust flaps; when you remove the kit, the car is totally reverted back to standard.

  • Yes, click the link for the installation guide below. The main challenge is locating the existing connectors to unplug which are under the rear bumper, just near the exhaust tailpipes. Once located, it is a one-handed job to unplug them.

    Installation Guide

  • The 'version 2' of the kit, developed in the second half of 2024 and into 2025 consumed most of my weekends and I spent a lot of money buying electronic devices to decode the messages, components to use in the kit and of course on the design and manufacturing of the kit. Add in raw material costs and some moderate profit on top and I believe the kit still comes in significantly lower than some other devices, certainly a new fabricated exhaust!

  • More than one person gave me feedback with version 1 that it was too cheap! I really appreciate the feedback but it's just a box which overrides the built-in exhaust flap. Why should it cost any more? I'm covering the raw material costs, plus the hundreds of dollars i've spent on R&D, and then i've added in some profit which I think is reasonable. The last thing I want is unhappy customers and I think i'd be unhappy paying any more for this ...

  • As with many products, they aren't rocket science. You just need some time, patience, money and a few tools which might cost you a lot more than one kit. I won't share what i've invested already but i'm telling myself that the tools will be useful for other stuff ;-)

  • Just a 992 owner a bit grumpy that his 'sports' exhaust was only sporty occasionally and who didn't want to modify his ECU or spend thousands on a new exhaust.

  • I don't have access to all the 992 variants and combinations of configurations so it's possible it won't work for your car. In this case, i'll refund you. This isn't my day job, so there's no reason for me to try and fleece you out of a few quid! I'll ask for the kit to be sent back and i'll refund you for the cost of the kit plus the standard postage/packaging you paid when you bought it. You'll be out of pocket only for the original cost of the postage. Note that if the kit is working but you're not happy with the change in sound, I can't refund this. It's a cheap kit, it's working. If you don't like it, remove it!

  • Version 1 kits were hand-made to order and tended to be built and delivered within 10 days. The version 2 kits (the ones for sale now) will be manufactured by professionals and i'll simply assemble and test. To start with, i'd suggest a similar turnaround time but once I have a few orders under my belt i'd like to have some stock 'on the shelf' which can be shipped immediately.

  • Check with me first if you aren't in the US, Europe or India. Shipping to the US seems to work well even though there seems to be a customs hold (missing docs) for a day no matter what docs I include! India is the most painful so far - shipping is nearly 2x the cost to the US and there may be an additional clearance fee to pay locally. UK and Europe no problems.

News

5th Jan 2025

It's been a few months now since I stopped accepting orders for the kit which i'm now calling 'version 1'. This kit is/was very simple - a few wires, a couple of connectors, and the simple benefit of just keeping the exhaust valves open all the time.

However, it simply didn't work for some owners. This was a massive shock for me as i'd been selling it for a while with no complaints. Initially it was the Carrera T owners who pointed out the issue, then some GTS owners, then it just spread. The only thing I could think of was the age of the vehicle but even restricting sales for 2019-2022 build cars still produced some issues. In all cases, the car simply wouldn't accept the kit and errors appeared on the dashboard. I sent out a handful of replacement kits, hoping that it would resolve the issue but it didn't.

So .. version 2

This is a very different kit - it still plugs in to each of the two valve controllers on the exhaust but now we have some electronics and a microprocessor in a small unit, mounted in the engine bay, dealing with the valve positions.

Without going into too much detail, this has taken quite a few months to design, test, refine and manufacture. Right now i'm awaiting the first pre-production kits to arrive with me, which i'll them test (as usual) on my car.

I'm pleased to say that lots of people have already pre-ordered the kit and there are a handful of people in the UK who have already volunteered to help me test on newer cars. Once this stage is complete, it'll be ready for sale.

So, what do you get with this kit?

For the initial release, I can certainly promise:

  • Control of the valves via your phone (iOS only)
  • Control of the valves via CarPlay
  • Still easy to fit, requiring no special tools or a ramp (although it'll take longer than for 'version 1')

.. and for future versions

  • Free updates for everyone (the app will update via App Store, and firmware can be updated too, if necessary)
  • GPS-based automatic switching (e.g. when returning home, starting up in the morning, or driving somewhere specific)
  • Fine-grained control of the flap position
  • Real-time visibility of the flap position on the App/CarPlay
  • Versions for non-turbo 992.1
  • Versions for 992.2

I wanted this kit to be out and for sale by the end of 2024 so take my estimates with a pinch of salt. But I have the app, the CarPlay working, a pre-production prototype working in my (2019) car, so there has been lots of progress. My estimate is Q1/2025 for the first deliveries.

I'm going to close the preorder window soon as it kinda doesn't make sense to be offering the kit so cheaply when I know it's cost me far more to make. After that point i'll stop taking orders until i've finished the kit and supplied to the folks already in the queue.

At this stage, my estimate for final price is 399 GBP which is approximately 495 USD or 480 EUR but I am still waiting for final pricing on larger manufacturing runs. From what I can see this is still quite a bit cheaper than either an exhaust or some other options out there.

16th May

Yesterday I got notification from PayPal that, as i'd reached a particular limit, they would possibly be restricting my ability to withdraw funds - eek! I really need funds to be available so I can purchase from my suppliers .. On top of this, I had a couple of customers recently selecting the wrong options from the Paypal button as it was a little confusing regarding shipping - I had to refund and ask them to re-order (a pain for both of us). I'd also had a bit of an uncomfortable moment when shipping to India for the first time I realised that my standard 'international' fee wouldn't cover it!

So today i've decided to 'upgrade' to a paid ECWID account which does a bit more order and customer management for me. Please bear with me as i've been using PayPal and Packlink relatively happily for the past couple of months and this will be a change! However, good news:

  • You can now choose whatever UPS shipment service you want, and it'll adjust pricing and ETA accordingly. Spend a little, or spend a lot - your choice.
  • You can use Apple Pay and Google Pay if you want! Nice and easy.
  • The order process asks which version of 992 you have, and which exhaust. It might help troubleshoot any issues.
  • You get more automated email updates as I make the kit, package and ship it.

The bad news is that i've had to hike the price a little. However, I think it still fits into the 'reasonably priced' category, especially when compared to an exhaust or other options.

14th November

Wow - how time flies! No updates since May .. sorry about that!

A lot has happened since earlier in the year - I have sold a lot of kits, which is great, and I got super efficient at the building, packaging and shipping. What was not so good is finding out that some of my kits didn't work.

Initially I thought that, maybe, there was a fault in the manufacturing, or possibly the fitment. But after more owners of newer models (especially Carrera T) got in touch to say that their kit threw errors, I realised that the later cars were the problem. It seems they are far more picky about changes to the wiring configuration.

Ultimately, i've decided to stop selling that kit but there is good news on the horizon ..

This week I have been road testing an entirely new kit. This one has plenty of embedded electronics which make it more complicated but should eradicate the CEL (check engine light) issues and also provide a load more features. Some cool things:

  • Apple iOS App to control the valve behaviour
  • Apple Carplay integration
  • View valve position real-time
  • Manually set valve position
  • GPS-based automatic valve closing
  • Siri and shortcut integration - wire up your own automation
  • 'Simple mode' - just make the PSE button keep the valves open all the time

The kit is still in development but progress is good - if you want to reserve your place at the top of the wait list, you can preorder now on the site. Note: If I don't get the kit shipped to you by the end of 2024 i'll refund you in full BUT you'll retain your position at the top of the priority list if you decide to order later.

For those of you who had issues with the previous kit, i'm really sorry - i'm trying to sort out those issues. For those of you waiting for a kit for your later 992.1, this is the one.

For those of you with a 992.2, I believe that this will work for that vehicle too but .. one step at a time!

For those of you with a non-turbo engine (GT3/S-T/etc), the connectors are different on those vehicles but I would hope some of the principles are the same. I just need to check/test.

13th May

Wow .. sales have really taken off recently! The graph is 'orders' in the first 2 months. Am managing to keep up with demand .. just .. but the R&D on the new switchable option has suffered a bit. I did manage to make up a prototype kit and get it fitted to the car but there are still some final bits to sort out - it's working as a wifi hotspot and the switch works quite well on one side, but not both yet. Need to do some more wiring. The box I am testing with doesn't fit so well in the engine bay so I may change things around a bit, also need to create an app to allow bluetooth comms to the unit, rather than WiFi. It all adds to the R&D time for this one but am going as fast as I can!

6th May

The orders are still steadily coming in - many thanks to all new customers, and for the positive feedback! It's fantastic to hear; please do let me know your thoughts - good or bad! A lot more orders from the USA recently - FYI shipping seems to take around 7 days at the moment, regardless of east/west coast.

I took the time to take a few more fitting videos - i've also invested in a microphone for my DSLR so when the UK weather stops thinking that it's winter, i'll head out and do some drive-by videos where the audio is a bit clearer.

A few folk asking about the switchable option - it is still being worked on, but I do recognise that there is demand! The main challenge is that we're moving from a very simple and small wiring connector to a more 'dynamic' component with some 'moving parts' so to speak. Nothing actually moves, of course, but there is likely to be longer wiring trails and there will be an active chip that manages the switching. I want to make sure it's reasonably priced and also easy to install so I think it'll be a couple of months before I can offer anything for sale, but i'll update the website as/when I have a prototype up and running.

26th April

A steady stream of orders over the last 10 days or so, generally from the UK. Interesting to read on a forum that someone thought this was a scam because the site seemed only to ask for shippping costs. I quickly amended it to show 'Kit+Shipping' !!

If you're in any doubt, please feel free to email me on the link below but I can assure you the kit is 100% real, works just fine and, in my view, is really how PSE should sound whenever switched on!

16th April

Another order rolled in today .. just after i'd finished refreshing the website! I also spotted a quote in a forum from another 992 aftermarked supplier who can also open up the exhaust valves .. as part of their tuning product. The quote that caught my eye was:

It is also good for about 10 to 12whp just by forcing valves open.

Just to confirm - I haven't dyno tested my car but it does make some sense. A turbo is a big restriction in the exhaust - and the greater the difference in pressure upstream (between the turbo and the exhaust valves) compared to pressure downstream (your catalytic converters, muffler and exhaust valves) suggests the turbo will spin up faster and, perhaps in theory, would deliver boost earlier. Whether this results in ultimately more power overall, i'm not sure. But it might sound faster ;-)

15th April

Purchasers of the 'first edition' kits have fitted and reported success. Hope i'm not putting words into their mouths but I think everyone is very happy with the kit. Many thanks for those who sent pictures and feedback after the install - it was really nice to see!

FYI I'm working on some new versions of the kit - let me know if either are of interest:

  • Remote control ON/OFF version. Use your phone to enable/disable the valve.
  • Wider 992 customisation tool - exhaust flap control, spoiler control, PASM control, cold start control, etc.

Still in R&D phase but there are lots of options on the 992 which may be configurable and customisable. I would like to get these available via CarPlay and/or using iOS shortcuts which you can set up and configure yourself. Note that this is NOT a modification to your ECU, but is more like adding another module to your vehicle. I want the whole thing to be easy to add and remove so there is no trace.

26th March

Just under a week after launching the site, the first install (a GTS) has happened! And two more orders in the pipeline - one for west coast USA, the other west coast UK! Am working on more pictures and a video for the installation instructions - watch this space!