Holley Carburetor Main Body - Retrofit - 750 CFM - Converts Standard 4777/4778/4779/76751 Carb to HP 86031M GM Fullsize Truck 2008-13

GM Fullsize Truck 2008-13

Baseplate designed with a boss that can be consumer machined for vacuum source

Old Tyme Black

These moderate sounding systems retain the dual exhaust system outlets and are designed to replace the original rear mounted mufflers using factory hangers and connections

and mounting clips

Holley Carburetor Main Body - Retrofit - 750 CFM - Converts Standard 4777/4778/4779/76751 Carb to HP 86031M GM Fullsize Truck 2008-13Carburetor Main Body New main jets are included, however further tuning may be necessary depending on the application Simple installation with common hand tools Pre calibrated at the factory for optimum performance and drivability on a wide variety of applications Reduces turbulence and smooths air entry into the venturi Eliminates choke tower and associated hardware of standard Holley Double Pumper Eligible For Holley contingency programs Product