These new gaskets fit 4160 series 780 CFM Holley 4 barrel carbs with vacuum secondary's, 1-1/2" primary and 1-3/4" secondary throttle bores and no removable jets in the secondary's. This carb is a spread bore with square flange bolt pattern.

Brand: Holley
Warranty: 30 Day
Manufacturer Part Number: PCS 780CFM VSBL Spread Bore & Vent Valve
Country/Region of Manufacture: United States