Reply to letter 29879 T2-T4 Grill Openings
#31486 from Andrew Aquilante · Rule change · TB 22-01 (2022-01 Fastrack)
In T2-T4, GCR section 9.1.9.2.D.8.a.8, clarify as follows:
"Exclusively for For the sole purpose of engine radiator cooling purposes, it is permitted to remove the outermost non-metallic
webbed false grill openings that are closed in mesh style factory grill openings. Maximum allowable increase in grill opening area
is 16 square inches. The modified grill opening mesh shape and contour must be retained as delivered from the manufacturer.
This allowance does not permit modification to dedicated brake-only or intercooler-only grill openings. (Note - It is the
competitor’s responsibility to be able to verify that 16 or fewer square inches have been removed.)"