I am not sure if they are 504 says they are different. I would think they would be different just beacause all of the company's list them seperate. The reason I was wondering is because I am looking to get trade my 200sx for crf450 and wanted to do the white plastics but I like the kits for the cr250 more and I cant find the carey hart kit in silver anywhere!!! I figured if I had to I could just do a little trimming as long as the seat covers are the same.