great product 11 mode... so easy to install took 10 mins and now the car sounds the way it should

A great Moneyball modification for the M135i.

One of my biggest frustrations with the factory setup is the dynamically controlled exhaust valve. While it's designed to balance sound and comfort, it often mutes the exhaust note and takes away some of the character of the car, particularly the pops and bangs that make the B48-powered M135i so much fun.

The 11Mode exhaust controller gives you full control over the valve position, allowing the exhaust to sound the way BMW enthusiasts probably wish it did from the factory. With the valve forced open, the car sounds noticeably more engaging, and I can hear far more of the pops, crackles and overrun burbles.

So far, it has been a fantastic value-for-money upgrade. I've only had it installed for a short period, so I can't yet comment on long-term reliability, but based on my experience to date, I'm very happy with the purchase.

the improvement is Amazing on the car, I installed in 5 minutes, the shipment arrive on time to Mexico

Excellent product although the unexpected import tax tarnished the purchase

Super easy to install, didn't need any tools or jacking up, works as described!

Excellent add on to my gt3 RS and extremely easy to install

Easy to install on my RS6. Took all but 2 mins. Hardest part was disconnecting the harness from the car. The sound difference is exactly what I wanted and tge car sounds way better. I leave it on all the time to hear the sounds and close it when I need to be stealthy. Worth every penny.

Got this for my 2026 M440i (EU model with OPF and all the other nonsense). The exhaust is just too quiet stock and with this simple device I can open it on demand. Especially cold starts are so fun now. And while cruising on the highway I just close it so it’s nice and quiet again. Installation took less than 5 minutes. Worth every cent.

Easy install. Does exactly what it advertised. Simple way to get a bit more rumble from your existing system. Should be mandatory.

Exactly as advertised.

I was a little sceptical on this as quite a few comments saying about having to keep switching valve to open but This new version is very good and saves a lot of messing around as remembers last setting when engine switched to off and restart sou DS good as well.

As described!

Easy to install och great sound improvement

Very easy install and memory is saved on every start up

Excellent service delivery to Canada went smooth looking forward to installing.