Can anyone with a stock height car tell me the "ground clearance" of the stock air deflector? TIA

Sure, I just crawled under my `88 Iroc and the lower air dam is 4 1/2" from the ground. Much closer than I thought. All original and stock suspension parts too.

Mines 2 1/2 but Im lowered

Curbs and bump stops a no no.

Later

Thanks guys...

while you got the measuring tape out, what's the distance from the ground to the lowest point on the bottom of the rocker? Correct me if I'm wrong, but wouldn't you define the bottom of the rocker the same as the bottom of the GFX?

Here's the rules I'm wondering about...
8.5.5. No body component, including the front air dam (spoiler) or lower radiator deflector, shall be lower than 4” measured vertically from the ground.

8.36.1. Minimum ride height is 4.5", to be measured at the lowest point of the rocker panel, but not to include welded seams, floor pan “bumps”, or fasteners.

Mine currently measures 4 3/4" to the bottom of the rocker GFX. 2" to the stock air deflector.