I was wondering if there is a difference in stay rear that hold on to the rear fenders from the chassis. I have an 09 raptor, and I bought new 2020 fenders. I was wondering if I keep my old stay rears or should I buy new ones for my new fenders. I see that on Rocky Mountain they have different part numbers? Did something change? Do I need the new ones for my new fenders? Or could stay with the old ones? My 09 part# is 1S3-21643-10-00 and the 2020 part# is 1PE-F1643-00-00. Please help.