You don't need holes in your bumper if you're running a diffuser(which most of the race cars have some form off); as it'll keep air from getting behind the bumper anyways. There are more benefits to running a diffuser vs. speed holes(which, imo, still don't work that well since you're still scooping air)
The one person who i thought would never agree with me did. Thanks
Man.. I got the diffiser on too btw. Ill post up pics tmw morning lmk what u think then.
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