Peter here from across the pond in Virginia, US. Looking to get a dual MC setup for my XR4Ti track car, and was wondering if any of you have good/bad experience with the dual MC box that demontweaks sells? (link

I really like the looks/principles of the box. Just curious if anyone has fitted one to their Sierra? I have read that a reinforcement plate needs welded to the firewall, and that's no problem.

Any notes?

Thanks!
Peter