Individual exhaust port gaskets and a ten-pack are the two choices for the 2007 Honda CB900F 919 here. Compare the shared replacement references with the installed connection, count the positions being serviced and choose the supply quantity that suits the work and any useful spares.
Replace one exhaust port gasket on your CB650, CB400, CB450, or modern CB900F with this Exhaust Port Gasket, 1 piece, replacing OEM #18212-634-000 /...
Stock up on exhaust port gaskets for your CB650, CB400, CB450, or modern CB900F with this 10-pack, replacing OEM #18212-634-000 / #18291-236-000 / #18291-MN4-920.Key...
2007 Honda CB900F 919 · Exhaust Gasket Service Buying guide
Locate the leaking joint before choosing a gasket
The original 2007 exhaust uses four 18291-MN4-920 gaskets at the cylinder-head ports. The offered single and ten-pack replace that reference; the muffler and rear exhaust joints use separate packing parts.
The individual listing supplies one port gasket and the bulk listing supplies ten of the same listed application. Four singles cover all four original cylinder-head port positions. The ten-pack is a stock quantity, not a complete exhaust overhaul kit.
Downstream joints have different seals
Honda lists the muffler joint packing and rear exhaust-pipe joint packing separately from the four cylinder-head gaskets. Identify the joint being opened and inspect its mating parts before ordering; a port gasket is not a universal seal for every exhaust connection.
Practical questions
How many singles are needed when all four headpipe port seals are replaced?
Four for the original exhaust: one at each cylinder-head port. Order by the joints being renewed, and confirm any changed header's requirements before relying on the original arrangement.
Do I need these gaskets for a muffler-only joint leak?
First identify the leaking connection. The original muffler and rear pipe joints use different packing parts; these port gaskets seal where the headpipes meet the cylinder head.
Does the ten-pack contain every gasket needed for an exhaust rebuild?
No. It contains ten port gaskets, not an assortment of joint packings or mounting hardware. Add the correct separate parts for the other joints being disturbed.
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