i have a new in the box progressive 460 rear shock for an 1800 wing, i am wanting to sell. it uses the stock wing spring, and preload piston. i bought it to upgrade my rear suspension, but just can't get up the energy to instll it. they list for over $500.00 dollars. can't remember what i paid for it but i'm asking $295.00 including shipping in the contenental usa. pm me if interested. i take paypal. bill