Custom processing is the purpose of air collection cup air filter installation adapter size air filter cup (mm) model KEIHIN FCR 37 39 41mm air filter inlet air collection cup applicable models 1130-808-7000 / 021-115 item number SCL-2022120041 specification plastic Air filter cup-red Suitable for car models CBR600F FZR400 YZF600 Product name: FCR37/39/41 special air filter cup installation model: FCR37/39/41 Weight: 30g Color: red Part number: 1130-808-7000 / 021-115 Velocity stack for Keihin FCR carburetors. Keihin high quality part. Flange: 59mm. Internal diameter:42mm-43mm oval Total length: 34.5mm Max OD: 72mm Fits: 37mm 39mm 41mm FCR carburetors Made in China