What do you think we used for the first few years of IT? Rear disc were not allowed in IT on a RX-7 for several years after the class became a SCCA class. I think 84 was the first year, and rear disc were not legal untill the 85s became legal for IT. We did just fine with rear drums, and I know people who still use them in IT. My own GT-2 RX-7 used drums in the early 80s with no problems. Just a tale from the past.



The car never went on track again untill the disc brake rear went in & it will never go on track again without rear discs.

BAD IDEA folks.............
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