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1981 Honda CB400TB Hawk Exhaust Gaskets

Choose an exhaust gasket by the joint it seals on your 1981 Hawk. The small port rings are available individually or in a ten-pack, while the headpipe and collector-to-muffler connections use separate sleeve-type gaskets that should be identified before ordering.

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Honda CB900 CB650 CB550 exhaust headpipe gasket (each) 18212-634-000

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000

$3.58 USD
17-2813
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 /...
Honda CB900 CB650 CB550 exhaust headpipe gaskets (pk 10) 18212-634-000

Honda CB Exhaust Headpipe Gaskets ~ (Pk/10) ~ Replaces 18212-634-000

$27.95 USD
17-3813
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...
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Honda CB450 CB400 exhaust joint gasket for headpipe 18391-413-000

1978-86 Honda CB450 / CB400 Exhaust Joint Gasket for Headpipe ~ Replaces 18391-413-000

$10.73 USD
17-4504
Replace your CB400 or CB450 exhaust joint gasket with this Exhaust Joint Gasket for Headpipe, replacing OEM #18391-413-000 / #18391-413-010.Key Features• Exhaust joint gasket...
Honda CB750 CB650 CB550 CB450 exhaust crossover gasket 18392-413-000

Honda CB Exhaust Crossover Gasket ~ Replaces 18392-413-000

$9.95 USD
17-4505
Replace your Nighthawk or CB400/CB450 exhaust crossover gasket with this Exhaust Crossover Gasket, replacing OEM #18392-413-000 / #18392-MG7-750. Fits the mid-'80s CB750SC/CB650SC/CB550SC Nighthawks plus...
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1981 Honda CB400TB Hawk · Exhaust Gaskets Buying guide

Order a seal for each disturbed joint

The original exhaust uses more than one gasket shape. Locate the cylinder-head, headpipe-to-collector or collector-to-muffler joint first, then select its corresponding ring or sleeve rather than matching a generic exhaust description.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000 Individual exhaust-port gasketOne gasket for an exhaust-port joint. Choose this listing when ordering individual replacement rings.View part 1978-86 Honda CB450 / CB400 Exhaust Joint Gasket for Headpipe ~ Replaces 18391-413-000 Headpipe joint gasketSleeve-type gasket for the headpipe joint; replacement reference 18391-413-000.View part Honda CB Exhaust Crossover Gasket ~ Replaces 18392-413-000 Collector-to-muffler gasketRear joint packing for the original collector and muffler connection; references 18392-413-000 and 18392-MG7-750.View part

Related parts: Ten-pack of exhaust-port gaskets

Keep rings and sleeves separate

The port gasket seals the exhaust-pipe connection at the cylinder head. The sleeve choices correspond to the front headpipe joint and the rear collector-to-muffler joint. Compare their positions in the original system before dismantling; a similar-looking sleeve is not a reason to exchange those applications.

Match package size to the work

The individual port-gasket listing supplies one ring; the linked bulk listing supplies ten. Select the quantity needed for the joints being renewed rather than inferring a pack from the product photograph. Check changed pipes separately, since their joint dimensions may no longer follow the original system.

Buying questions

Does the bulk port-gasket pack contain ten?

Yes. The package contains ten exhaust-port gaskets. The individual listing contains one; choose between them according to how many repairs or spare rings you actually need.

Are the two sleeve gaskets the same part?

No. The headpipe-joint gasket uses reference 18391-413-000, while the collector-to-muffler choice uses the 18392 reference family. Identify the front or rear joint before choosing the sleeve.

Will these seals suit an aftermarket exhaust?

Compare the aftermarket system’s joint dimensions and instructions. These selections follow the listed original-style applications; a replacement header, collector or muffler can use a different sealing arrangement.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

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