for motorcycle exhaust db killer Gorgeri 51mm Universal Stainless Steel Motorcycle Exhaust Pipe Muffler Silencer Insert DB Killer Noise Eliminator DB Killer (Style 4)
Amazon.com: KAJIMOTOR Universal 51mm Metal Motorcycle Exhaust Can DB Killer Silencer Muffler Baffle : Automotive
Amazon.com: KAJIMOTOR Universal 51mm Metal Motorcycle Exhaust Can DB Killer Silencer Muffler Baffle : Automotive
Amazon.com: Exhaust Muffler Carbon Fiber 1.5-2"Inlet with Removable DB Killer for Street/Sport Motorcycles and Scooters with 38-51mm Diameter Exhaust Pipes : Automotive