Amazon.com: 48mm 1.9 inch Motorcycle Exhaust Pipe Muffler Silencer, Universal Motorcycle DB killer Silencer, Exhaust Muffler with Removable DB Killer 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
for motorcycle exhaust db killer Gorgeri 51mm Universal Stainless Steel Motorcycle Exhaust Pipe Muffler Silencer Insert DB Killer Noise Eliminator DB Killer (Style 4)