I've about decided to get the black FR 22's but I read they have a noticeable impact on performance. I haven't seen though where anyone has times posted to quantify the difference. Anyone run these at the track yet to have a real world before and after time? How about 0-60? I dont go to the track that often and plan on keeping my 20's but hate to loose a really noticeable performance where I think our Jeeps are the most fun.