10 new top quality choke fast idle linkage & secondary linkage arm mounting screws for Holley 2 & 4 barrel performance carburetors, these hard to find screws attach the choke linkage on the end of the primary throttle shaft, and the secondary accelerator pump cam bracket on the rear throttle shaft.. also fits similar AED, Avenger, BG, Demon, Grant, QFT, Street Avenger, etc. carburetors. please see our store listings for a huge selection of Holley carbs & parts.