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1979 Honda CB400TI Hawk I Exhaust Gaskets

Ordering exhaust gaskets for a 1979 Hawk I is easier when each removed seal stays associated with its joint. The port gasket comes individually or as a ten-pack; the headpipe-joint and crossover products are separate applications and references. Choose by location before deciding quantities.

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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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1979 Honda CB400TI Hawk I · Exhaust Gaskets Buying guide

Build a seal list from the joints you will open

Use the joint position and verified replacement reference together. Similar-looking sleeve seals are not evidence of interchange, and a port-gasket multipack should not be mistaken for a complete exhaust sealing kit.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000 Individual exhaust-port gasketOne exhaust-port gasket per item; replaces references including 18212-634-000. Order according to the ports being serviced.View part 1978-86 Honda CB450 / CB400 Exhaust Joint Gasket for Headpipe ~ Replaces 18391-413-000 Headpipe joint gasketFor the exhaust headpipe joint; replacement references 18391-413-000 and 18391-413-010.View part Honda CB Exhaust Crossover Gasket ~ Replaces 18392-413-000 Exhaust crossover gasketCrossover seal replacing references 18392-413-000 and 18392-MG7-750; also specified for the slip-in muffler’s original-box connection.View part

Related parts: Ten exhaust-port gaskets per pack

Choose package size after identifying the gasket

The individually sold port gasket and ten-pack share their listed replacement references. The difference is purchasing quantity, not a set of ten different exhaust seals. Keep the headpipe-joint and crossover requirements separate when preparing a complete repair order.

Use distinct references for the pipe joints

The headpipe joint seal carries references 18391-413-000 and 18391-413-010. The crossover seal carries 18392-413-000 and 18392-MG7-750. Compare the actual joint, especially on a nonstandard exhaust, rather than relying on the similar appearance of the two sleeve-style products.

Common buying questions

Is the individual port gasket the same application as the ten-pack?

Both products list the same port-gasket replacement references and this Hawk I application. The individual item supplies one gasket; the multipack supplies ten. Choose the pack size after counting the port seals required for your work.

Can I substitute a headpipe joint seal for the crossover seal?

Do not treat them as interchangeable. They are identified for different joints with different replacement references. Compare the seal location and the fitted exhaust before ordering, even if the removed pieces look broadly similar.

Which seal is specified with the chrome slip-in muffler?

For that muffler’s connection to the original exhaust box, the specified part is the crossover-gasket type. Confirm that the original-style box and joint remain in place; a modified connection needs to be identified separately.

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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