Did you just cut the holes with a hole saw? Bmp says 3 hp that a pretty good gain for cutting some holes. I qas also wonderig if you got anymore intake noise
I only got intake noise when I took the horns out of the hood then it got loud. But for feeling a difference no I can't say I could but in all fact it improves the air flow in the motor so maybe 1 hp gain or so. But noise was a lot louder