A 2026 m850 owner and I recently went with the cat-back Yonristic exhaust. Customer service was top notch and at one point while emailing them (pre purchase), I thought I was dealing with AI, but it turns out it was a live person (on Sunday). I did the install and found that the Yonristic valve actuators were required but I wanted to stick with the OEM actuators. Turned out that the car wiring harness would not reach the new location of the exhaust valves (actuator), so I contacted their support. Support strongly suggested I use the Yonristic actuators, but I did not want to wiretap in for a power source. As a result, support (Jonathan) agreed to send me out extended cables so I could maintain the OEM actuators, at no cost.
If you order this setup and go with the OEM tips option, it is not the same as the OEM exhaust tips, in my case it was better. The OEM tip type on the Yonristic has the exit pipe that will fit through the OEM m850 diffuser so you can add 3.5iinc tips. Of note is, there is two exit pipes one is 3 inches and the other is 2.5, so keep that in mind when ordering tips. . Loving the setup and the sound is much better than stock, especially after adding the MAD exhaust valve controller. The Yonristic did include a valve controller but decided on the MAD.
thanks to the team at Yonristic!