Hood scoop

I measured a factory hood and the holes were 4.125" If were inclined to use 4" it would still work but the grommets may fit a little snug.

MEASURE your hood grommets first. The holes I made were 4 1/8” as per all of the information I found. They were TOO BIG !!! My grommets were from DMT . You have been informed !!
better that they be snug and therefore working than loose and ineffective - ask me how I know this :rolleyes: