Street Glide Special FLHXS 2021 Harley-Davidson Street Glide Special FLHXS. A blacked-out performance bagger, loaded with premium features. With a MILWAUKEE-EIGHT 114 ENGINE. The most displacement in standard H-D Touring models. You get 114 cubic inches of passing and horizon-chasing power. Stop by for a test ride today on this beautiful Street Glide Special in Billiard Red!