K&N Stubstack Air Horn 1.25in ID x 1.68in W x 0.485in H
KNN85-5039
This K&N Stubstack fits 1-1/2" SU carburetors of type H4, HS4, HIF14, HIF38, and HIF4. K&N Stubstacks are 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.
