Peterson Fluid Systems Vacuum Regulator Plug

Peterson’s adjustable vacuum regulator is on the leading edge of engine management. It has been proven to regulate crankcase vacuum and hold a steady level through extensive testing. Vacuum can be regulated from as high as 29.7 in/hg down to 2 in/hg. Retro kit available to switch your regulator to the new design. Fits -12 port AN. Includes aluminum weld bung for valve cover.