some forums dont allow vendors to post direct links to their website, i might not 100% sure on the rules on this forum
here is the link to the product
MAD Valve Controller - Customize Your Exhaust Sound & Performance | Compatible with BMW, MINI, and Toyota Supra A90 Mk5 (x-ph.com)
Elevate your driving experience with the MAD Valve Controller, the premier solution for exhaust customization in your BMW, MINI, or Toyota Supra A90 Mk5. This advanced controller allows you to take full command over your vehicle's exhaust flap, enabling you to customize the exhaust note to...
I've tried both on my car. If you're looking for quick power with minimal investment, the JB4 is an excellent choice. It takes just 45 minutes to install, and the difference is night and day.
If you're after the best tune and aiming for even more power than the JB4 can provide the Femto +...