Set of 4 replica rubber intake insulators, manifolds or carburetor holders, call em what you like. For use with the stock carburetors on the Honda CB550K. All 4 boots are the same. If you've discovered cracks on your stock intake boots, it's time to replace them because they're most likely leaking air which leans out your air/fuel mixture. A quick way to check is to spray something non flammable on the boots with the engine running, if you hear a change in RPM, they are leaking for sure!
Inner Diameter: Side A - 32.5mm - Side B - 34.5mm
Outer Diameter: 48mm
Overall Length: 29.8mm
These are to be used with carburetor model X46A or PD46C.
Honda Part Number: 16211-404-000
CB550K - 1977-1978
may fit other models....