Custom processing No use Silencer Size 51mm 60mm (mm) Model 51mm 60mm Applicable models General modification Item No. SCL-2017090011 Specifications Type A 51mm without catalyst, Type A 60mm without catalyst, Type B 51mm straight, Type B 60mm straight, Type C 51mm flat head, C type 60mm flat head, D type 51mm bullet head, D type 60mm bullet head Product Name: Modified motorcycle exhaust pipe 51mm 60mm muffler porous sound reduction plug back pressure core silent catalyst silencer Product description: Modified muffler catalyst sound reduction plug to reduce noise, Purified tail gas standard product weight: A 120g B 260g C 210g d210g