I put a Sundowner on my Street Glide. Is is a lot more comfortable and it looks good on the bike. I first tried a Mustang seat made for the RK Custom. I was told that the RK Custom seat would fit. The Mustang was too big and dorky looking on the Street Glide. That's too bad because I like the comfort of the Mustangs.sking said:Installed a Harley Sundowner seat on my 03 RG. All I can say is WOW!!!, what a difference in riding comfort. It's good bye stock seat..