7L/V8 1990 - 1993 GMC C2500 4
25/8 V 1968 - 1973 Chevrolet C10 Suburban 3
Header gaskets are included for a simple installation
12/8 V 1973 - 1974 Chevrolet Blazer 4
3L V8 1955 - 1956 Chevrolet Truck 324/5
4000 Series Module Kit, Even Increments - 8744 idle-air-control-valves 7L/V8 1990 - 1993 GMCOverview: Each kit is within a 1,000 rpm range. For example, the PN 8745 is supplied with: 5,000, 5,200, 5,400, 5,600, 5,800 modules. Features: Application: Year Make Model Submodel Engine Size Universal Specs: Brand MSD C. A. R. B. EO # D 40 29 Emission Code 1 Product Type RPM Modules Warranty Limited 1 Year Warranty