Originally Posted by 8thracer

Id take issue with what you say about diffusers being illegal ? If you go through the 2015 BRCA construction rules there is nothing relating to under body/chassis in there that would exclude this. In fact in the wet all sorts of guards start appearing on chassis anyway and usually only questionable if the technical inspection deems them unsafe under ruling below.

1.1.2 The Designated Officials may disqualify any car that, in their opinion, would be a hazard to spectators or other cars.

Surely HB anyway would have already ensured these parts are of a material and size that wouldn't fall foul of all EFRA and IFMAR construction regs ?