Missing at 2200 rpm???

Well I got the exhaust on today and wanted to take it for a spin and noticed before I got it in gear that it seems to have a miss that doesnt start until a little over 2000 rpm. Idles smooth and comes off idle well but seems to feel like a rev limiter is kicking in. I dont remember doing it last weekend but it sure did today. Any ideas?
Author: 71DartGuy