Staggered Duals For Evolution FXR Models From 1984 - 1994 primary & drivetrain 757BR Derby cover for 1936–1964

757BR Derby cover for 1936–1964 tin primary

355 7" rise

170T For Big Twins with Timken bearing necks (10

Takes the place of aluminum inner primary

Staggered Duals For Evolution FXR Models From 1984 - 1994 primary & drivetrain 757BR Derby cover for 1936–19641 3 4" Staggered Duals For Evolution FXR Models From 1984 1994 Seven different sets of drag pipes and muffler exhaust systems to choose from for all 1984 1994 Evolution FXR models. They all have slider channels on the mufflers (except the 34" long drag pipes) that will let them bolt up to the stock HD mounting brackets on models thru 1992. Heat shields are recommended. 731* 34" long Slash Cut drag pipes (use Paughco #725D clamps to install) 731A* 34"