Section 7.5.4 in the new rules was cleared up considerably with the exception of one small statement, specifically:
“must be centered at the same front/back location as the OEM deflector +/- 1””

Dan’s car doesn’t have the stock air deflector and hasn’t since he has owned it. Where is the stock air deflector mounted? More specifically, from where to where are the tech officials going to measure to reliably determine the legality of the air deflector? I’m specifically concerned with the 4th gen Camaro but it is a valid question for all platforms.

Additionally, the rule is concerned with the position of the air deflector and not specifically the air deflector mount. These dimensions are both the same if we assume the air deflectors are exactly vertical. What if it isn’t? Or what if the stock air deflector isn’t vertical? Obviously it can’t be horizontal, like a splitter. How much angle is tolerable? Does the entire deflector have to be inside an envelope +/- 1” from the stock deflector?

The deflector on Dan’s car is a semi-rigid plastic backed up with metal angle brackets. The actual angle of the deflector is pretty dependent on what direction the car was traveling when the deflector last contacted something. It bends backwards when he goes off track forward. It bends forward when he pulls it out of the trailer (or goes off track backwards).


Thanks,
Richard P.