I had the following:

Abarth 500 Esseesse
Abarth 595 Competizione
Volkswagen Golf 7 GTD
Fiesta ST MK8
Puma ST

The valve controller is on my car, we recorded a video compared to stock on what the difference is.

I created a little comparison video for everyone to compare.

I bought the product and create a post about it, I tried to explain things as much as I could and provide an example of steps on how it works: viewtopic.php?f=21&t=1603

As some of you have might noticed, the valve in the exhaust on the Puma ST closes when you start driving the car. I always thought the valve would open up when driving in Sport, but that's not fully true. As soon as you hit the sport button, the valve opens, but after hitting the throttle for just a...

Ref the mountune....as in pick-up, accelerating through the gears. This has nothing to do with Mountune. I have Mountune on my car as well. Hi martn, I think you misunderstood the question, I believe denty was just asking for you opinion on the mountune map in general as you have it installed. :D A...

denty1964 wrote: ↑Mon May 09, 2022 8:25 pm Ref the mountune....as in pick-up, accelerating through the gears.

This has nothing to do with Mountune. I have Mountune on my car as well.

I have installed the valve control to my Puma, a MASSIVE difference! It makes such a good sound now, much better than stock. If it’s too much I can turn it off in seconds.

denty1964 wrote: ↑Fri Apr 22, 2022 2:52 pm How much difference can you tell running the M235 on the Puma.

Difference in what way?

Rizmo wrote: ↑Fri Apr 22, 2022 4:00 pm How does this noise stuff pan out when a vehicle is due an MOT.

I don’t know, but I’m not from the UK. MOT here is different, they don’t check sound.