Well I was driving to school this morning, and the radar detector started going off. I was doing about 50 (in a 45), so I played it safe and slowed to about 44 or 45. I come around the corner and it turns out it wasn't a cop but one of those stand-up speed things that displays your speed in big red letters. As I come up on it I look and it says I'm doin 51, even though the speedometer says I'm doin 44, 45 at the most. I double check both, and sure enough my speedometer was 5-6 mph off from that. I have stock gears (and everything else except shorties, o/r h and cai), so I don't know what the deal is. Even though it's only 5 or 6 off, regardless which is wrong, I usually cruise about 5 over, which they will let slide, but 11 is a different story. Just wondering whats going on.