Stock quality muffler/silencer typically used on size 50cc and 70cc 2-stroke gas scooters of the Yamaha Jog clone variety This muffler is painted black steel.Description Stock quality muffler/silencer typically used on size 50cc and 70cc 2-stroke gas scooters of the Yamaha Jog clone variety. This muffler is painted black steel. WARNING California Residents: Proposition 65 Warning Specifications Overall Length: 17″Case Length: 15″Case Diameter: 4-1/2″Exhaust Length: 2″Exhaust Diameter: 2″Mounting Distance: 2-3/4″