Complete set of Genuine Honda exhaust pipe joint collars, there are 2 collars for each header. These collars crush the exhaust gasket evenly as you tighten the nuts on the studs. These are designed to work with the stock flanges. Exhaust gaskets sold separately.
Sold as a set of 8
Honda OEM Part Number: 18233-107-000

Fits Honda:
CB400F - 1977
CB500K - 1971-1973
CB550K - 1974-1978
CB550F Super Sport - 1975-1977