I put one on last summer. I absolutly love it! I noticed a deeper exhaust note and idle. A noticable difference in low and mid range power as well. There has been much debate on cutting the stock cover. I have heard plenty of good feedback on it, but I have never seen hard numbers on performance gains either way. Tho, I believe the DNA would out perform (drivability/ridability, smoother power delivery) simply by design. The air will flow better and more consistant.
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