Custom processing is the purpose of exhaust pipe interface size 61MM to 51mm to 38MM (mm), model 60 to 51, 51 to 38, applicable model GY6 Qiaogefuxi 125-600CC size displacement, article number SCL-2017040007, specification 60 to 51, stainless steel long, 60 Turn 51 aluminum alloy short, 51 turn 38 stainless steel suitable models CBF500, CBR500X, CBR250RR brand list CB400 CBR CBR125 CBR250 CB400 FZ16 FAZER600 material stainless steel product name: 60mm to 51mm adapter 38mm to 51mm adapter product material: stainless steel product weight: 0.2 KG Product size: As shown in the picture Product accessories: None Adapted models: 125-600 CC motorcycles, off-road vehicles, scooters, karts can be modified such as GY6-125 GY6-150 NIAJA 250 CB400 CBF500 ER-6N, etc.