Compatible With Holley 390 600 750 CFM carburetor,such as 1841849,1850,3310,6619,6909,8007,9834,80457,80463,80508, 80529. Fit For Holley Quick Fuel37-119 Holley 4150 4160 Carburetor. Compatible With All Holley Perf. Carburetors ,ROAD DEMON JR tm,ROAD DEMON tm,and vacuum secondary SPEED DEMON tm. Replace:Barry Grant kit P/N 190003 and Holley kits P/N 37-119,37-720,37-754,37-1542. Includes:O-rings,pump diaphragm,needle and seat,and power valve. FITMENT:Quick Fuel 3-119 Holley 4160 4150 Carburetor. FITMENT:Holley 390 600 750 CFM 1850 3310. FITMENT:Road Deom Jr Road Demon vacuum secondary Speed Demon. FITMENT:Barry Brant OEM 190003. FITMENT:Holley OEM's 37-119, 37-720, 37-754, and 371542. Whole Kit Includes The Following : A PAIR OF ALL FUEL BOWL AND METERING BLOCK WASHERS NEEDED TO REBUILD ANY OF THE ABOVE MENTIONED APPLICATIONS Standard Hi-Flow.110" Needle And Seatscarburetor Base Washer Air Horn Washer Nylon Reusable Bowl Screw Washers New Brass Idle Mixture screws Special No-Leak Fuel Inlet Washers New Needle And seat screw and Nut New Accelererator Pump Squirter Check Valves Reusable Bowl And Metering Bowl Washers one Of POWER VALVES One Vacuum Secondary Diaphragm One 30cc Accelerator Pump