BHolley 0-80570 570 CFM Four Barrel Carburetor ReviewbP PP Holley 0-80570 570 CFM Four Barrel Carburetor PNeedle and seat design eliminates external float level adjustmentPDual feed fuel inlet with vacuum secondary typePSilver finish with built-in secondary fuel filtersPIncludes vacuum for PCV, EGR, power brakes, distributor, air cleaner, and canisterPPower valve blow-out protection adds trouble free operationP