just make some at the size you want, about a 30 - 35 degree angle i think is what i used on mine. though i dont reccomend diamond plate for radiator scoops, its thicker and heavier than what you need might have troubles with it stressing on your radiator too much. but thats just me talking.
I would think bigger is better, Hardrock & modquad makes them,(PLUG) But the angle of them, well are you going to tie them back into the frame (ect) then you can make them bigger. Also remenber, (force) does'nt come into play,(just drag) well most times. Till you hit 80mph. IMO Short times are no-prob-lem-o
I have a few tricks that I have done to mine. No pics at this time.
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