1979 Honda CB400TII Hawk II Exhaust

Before buying exhaust parts for your 1979 Hawk II, identify which sections of the original system remain. The available slip-in muffler is a single-side purchase, while port and joint gaskets serve different connections. Match the repair to the exact joint being opened.

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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

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

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

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

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...

Chrome Slip In Style Muffler ~ 23 7/8" Long

$139.95 USD

Chrome Slip In Honda Style Muffler ~ 23 7/8" Long with 4" Diameter. Fits to bikes that use a slip in inlet such as...

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1979 Honda CB400TII Hawk II · Exhaust Buying guide

Plan the repair around the retained exhaust

The muffler’s slip-in connection and the separate exhaust sealing positions determine the parts order. Check for replacement headers or a removed collector before relying on the original-system application.

Parts to consider

Chrome slip-in mufflerSold individually for either side, with an adjustable slide bracket. The muffler is 23 7/8 inches long and 4 inches in diameter.View part

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

Individual exhaust-port gasketOne exhaust-port gasket per order, with specific 1979 CB400TII coverage. Choose the quantity needed for the port joints being serviced.View part

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

Collector-to-muffler joint gasketGasket using references 18392-413-000 and 18392-MG7-750. The slip-in muffler listing identifies this gasket for its connection to the original collector.View part

Check the muffler installation as a whole

The chrome replacement can be used on either side and includes a sliding mounting bracket. Compare its 23 7/8-inch length and 4-inch diameter with the available space. Inspect the existing collector outlet and support points before choosing it for a system that may have been altered.

Order seals by their exact position

The individual port gasket and related ten-pack address the same type of port seal in different purchase quantities. The headpipe joint and collector-to-muffler gasket are separate choices. Identify every joint being disturbed, then select its correct seal rather than ordering several similar-looking rings.

Common buying questions

Does one muffler order include both sides?

No. The muffler is sold each and can be fitted on either the left or right side. Order two if replacing both, after checking the retained collector connections and the mounting space on each side.

Will this muffler work with aftermarket headers?

Confirm the actual outlet, joint arrangement, support points and clearance first. The listed application uses a slip-in connection, and the linked joint gasket is intended for the original collector. Modified headers need their own measurements.

Should I buy single port gaskets or the ten-pack?

Choose according to the number of port seals needed for your work and any spares you want. The single listing supplies one gasket; the bulk listing supplies ten. Neither package is a full set of every exhaust-joint seal.

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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