Quote Originally Posted by JeffYoung View Post
Hmmmm..to me whether they work or not seems irrelevant.

Let me throw out a hypothetical.

Car A comes with a plastic but adjustable cam timing gear.

Rules say:

a. You can change plastic cam timing gears to metal.

b. Except that you can't use adjustable gears unless fitted as stock.

Does this mean the guy with the adjustable cam timing gear LOSES this "stock advantage" if he switches to metal?

I would say no, and I think the same is true with the RR shocks.
That would be a good comparison if the old shock wording had said RR shocks are prohibited unless fitted as stock, but that's not what it said. It was very clear that replacement RR's are not allowed. There is no reason to change that. The legality of stock RR's was debatable, with the new wording, now that's clear.

As for the keyway on a replacement timing gear, if it doesn't match stock dimensions (including angular relationship to the gear teeth) it's not legal.