Big Gun Exhaust Rev Box CDI Unit for 2005 07 Honda TRX400EX Sportrax 40 R22 1985 Yamaha YZ250 National Cycle’s Chrome Lowers are National Cycle’s Chrome Lowers are engineered for proper fit Product Details Tire Diameter Speed Rating Load Rating Wall Construction Tire Tube Type Rim Size Product Line Arlen Ness Stage I Big Sucker Air Filter Kits Part Number 18 561 Fitment Type Air Filter & Intake Unit Sale Qty Style Red Filter with Black Powder Coated Back Plate Material Billet Aluminum Color Size Finish No Cover Included Position Functional Length Cable Sleeve Length Cable Sleeve Travel Driver Seat Length Passenger Seat Length Driver Seat Width Passenger Seat Width Piston Cylinder Size Piston Size Added Cylinder Stroke Volume Final Engine Displacement Exhaust Configuration Muffler Size Muffler End Tip Style Windshield Height Windshield Width Handlebar Diameter California Air Resource Board Compliance FALSE Product Disclaimer If you are looking to swap out your stock CDI box The Big Gun Rev Box is offered for various offroad MX and ATV models