slate blue

Colin I think what I saw years ago was 355 mm or 350 mm discs with 17" rims. Also the smallest wheel you can use with the 390 to 394 mm brakes is 19" They are super close when they go out to 394 mm as per Ferrari usage. I know there is different rims. So given your discs are 7 mm in radius smaller and your wheels are 13 mm smaller it is going to be a very tough ask.

I am going to use a 355 mm disc that is used on the racing EVO 9's. It is not quite as heavy or as thick as the Cup Car discs which is a 350 mm in diameter and 34 mm thick however it still has more surface area than the standard 355 mm narrow annulus discs and greater ability to deal with the heat. Brembo does sell a 370 mm disc btw.

Greg