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Air Horn, SU H6 / HS6 and 1.75" Zenith-Stromberg Carburetors

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This high quality spun aluminum velocity stack is designed specifically to fit the 1.75 inch SU H6 / HS6 and Zenith-Stromberg HIF44 carburetors on many Triumph and MG engines. It will also fit the Hitachi clone of the SU H6 / HS6, which is found on some Datsun engines.

This part is carefully crafted to the original Kas Kastner pattern. Dyno tests have shown an amazing increase of 4-6 horsepower on four cylinder Triumph engines, and up to an 8 horsepower increase on the Triumph GT-6. The overall height including mounting flange is 2.8", and the bell has a maximum OD of 5.1". Throat ID at mounting flange 1.625". Sold individually.

How does a 1 5/8" horn fit a 1 3/4" carb? Carburetor size nomenclature refers to the diameter of the throttle plate, not to the size of the inlet opening. H6/HS6 and HIF44 carburetors have a 1.75" (44mm) diameter throttle butterfly. If you remove one of these carbs from the manifold, you will measure a 1.75" diameter outlet on the back of the carb. The opening on the inlet (air filter) side on all of these 1.75" carbs is 1.625" diameter.

Qty
Part No.
Price
Stock Status
3894-01

Condition: New

$77.99
In Stock