I could not get low enough with the camera and my aching body, but there is actually a 1/2" gap the entire length across the bottom. this should allow more airflow than the previous block and also be more aerodynamic. There is no gap besides the bottom and of course, under the hood. I screwed it right to the bumper
My 1995 Chevy truck is still in great shape for the age and low miles
Sorry about the crappy pics, but I think my crappy camera has something to do with that. I am not a photographer, just an ecomodder