Thumper Fabrication TF010701-X Ranger Big Nerf Rails (Crew)Thumper Fabrication TF010701 X Ranger Big Nerf Rails (Crew) WIDE, LARGE, & IN CHARGE. These nerf rails for your Polaris Ranger XP 1000 (Crew) and Ranger 1000 (Crew) give you the BIG step up you need. Great for accessing your Thumper Fab roof rack or protecting your Ranger from brush and trail debris. There is simply no other nerf rail like these for your Ranger. These bad boys are stout! Compatible with Ranger Northstar doors and provide great