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. This mod keeps the flap open permanently.

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 mod consists of a pair of connectors that are plugged in to your vehicle; to reverse the change they simply need to be unplugged. There is no change to your ECU and no need to rewire any existing wiring. Once removed, the vehicle is identical to how it left the factory.

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

I've worked out the raw costs of the materials and the time to assemble the kit. Then, guessing how many i'll sell, i've added on a little to cover my R&D costs and, frankly, to make it worthwhile! The kit is being sold at a discount initially to gather feedback on 992 variants I haven't specifically tested on. The first edition was cheaper but, since then, 2 things have happened - (1) i've had to swap to another supplier who is charging a few $ more, and (2) I worked out all my true costs and realised how tight my margins were! I don't want it to be too expensive but I did spot a similar kit for another vehicle which was over $120!

Good question. The alternatives are to purchase and fit a new exhaust and/or free flow catalysts (the thick end of £3000 at least), a ECU re-map (£1000+) or a valve controller (£600-700). Given the simplicity of this solution I thought it was reasonable to price at the lower end - and simply because i'd rather sell 1000 than 10!

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. With some investment in tools, some time taken for R&D, plenty of mistakes and some patience, I developed a reliable way to keep the exhaust flap open and release some more sound!

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!

All the kits are being hand-made to order. Each kit is checked and packaged by hand. As a result, turnaround is not immediate but I aim to dispatch within a few working days of order.

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.