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1978 Honda CB400TI Hawk I Exhaust Gaskets

Three different sealing jobs are represented in the 1978 Hawk I exhaust gasket range. Match the gasket to the opened joint first, then choose the package quantity. A ten-pack of port rings does not replace the headpipe joint or crossover seals.

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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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1978 Honda CB400TI Hawk I · Exhaust Gaskets Buying guide

Identify the sealing position before counting gaskets

The port ring, headpipe joint gasket and crossover gasket have different references and jobs. Compare the old joint and the exhaust layout, especially where replacement pipes or a different collector have been fitted.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000 Single exhaust-port gasketOne exhaust-port gasket; replaces references 18212-634-000, 18291-236-000 and 18291-MN4-920.View part 1978-86 Honda CB450 / CB400 Exhaust Joint Gasket for Headpipe ~ Replaces 18391-413-000 Headpipe joint gasketHeadpipe joint gasket replacing references 18391-413-000 and 18391-413-010; distinct from the exhaust-port sealing ring.View part Honda CB Exhaust Crossover Gasket ~ Replaces 18392-413-000 Exhaust crossover gasketReplacement for references 18392-413-000 and 18392-MG7-750; match it to the larger exhaust connection being serviced.View part

Related parts: Exhaust-port gaskets, pack of ten

Buy port rings in the right quantity

The individual exhaust-port gasket supplies one piece; the linked multipack supplies ten of the same application. Both use the same replacement references. Count the port joints involved in your repair and keep workshop spare stock separate from the quantity needed for this job.

Keep the larger joint gaskets distinct

The headpipe joint gasket replaces references 18391-413-000 and 18391-413-010. The crossover gasket replaces 18392-413-000 and 18392-MG7-750. Use the joint location and matching reference together; their sleeve-like appearance does not make them interchangeable at every exhaust connection.

Buying questions

Is the individual port gasket one piece or a pair?

It is one piece, sold individually. Count the exhaust-port joints included in your repair before ordering, or choose the separate ten-pack if you deliberately want additional matching port gaskets.

Does the ten-pack include the headpipe and crossover gaskets?

No. The ten-pack contains exhaust-port rings only. Headpipe joint and crossover gaskets are separate items and should be chosen for the particular larger joint you are opening.

Will these seals fit an aftermarket exhaust?

Compare the aftermarket system’s connection design and required seal dimensions before ordering. The model application alone cannot establish the seal used by changed pipes or a replacement collector.

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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