Same reason they allowed the threaded body shocks after they had been banned. Prices on them came way down and people were jumping through hoops to legally use the now much less expensive TB shock, so why not make it cheaper and easier and just allow them.
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Not exactly... The end result of changing the shock rules to make sense, as they do now, was NO change in the performance of the shock... People just didn't have to buy their Penskes, machine the threads off, then add the sleeve... They can just use them straight up... SAME performance...

This ECU thing is an entirely different level of rule adjustment... NOT the "same reason" at all.... I know.... I was there...


...so you and anyone else that feels that way say "no, thanks" and opts out. It's not a requirement - any more than pro-built engine internals, balancing, or anything else might be.

K
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They COULD have said that WITHOUT the rule change... Now if they do, however, the tradeoff is MUCH larger...