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K&N 85-0800A Stubstack Air Horn

Performance Products > Stubstack Air Horn
  • Fits Demon 750/850 carburetors
  • For use without an air cleaner, but will hold down a cold air scoop
  • Increases the airflow by reducing restriction
  • Reduces turbulence, improves metering accuracy
This K&N Stubstack® is designed to be used on Demon 750/850 carburetors. The full radius design helps to increase the airflow for drag racing. Will also hold down the baseplate of a cold air scoop. Will not work with K&N Custom Chrome Racing Air Cleaners. The K&N Stubstack is designed to increase the airflow of carburetors by decreasing the restriction around the choke horn. The stubstack fits inside the air cleaner housing and slides snugly down over the choke horn.


Available Information

Product Specifications

Adapter Flg OD7 in (178 mm)
Carburetor Flange Size5.125 in (130 mm)
Carburetor Type4150
Height2.156 in (55 mm)
Length7.031 in (179 mm)
Material UsedAluminum
Package Quantity1
Product Box Height6.75 in (171 mm)
Product Box Length7.38 in (187 mm)
Product Box Width6.38 in (162 mm)
Product StyleCarburetor Adapters
Weight3.9 lb (1.8 kg)
Width7.031 in (179 mm)

K&N 85-0800A Stubstack Air Horn Product Reviews