Fittings and Gauge Included, Street/Strip Carbureted Applications, Two Port, Adjustable from 4.5 to 9 PSI; Holley® Die Cast Bypass Style Fuel Pressure Regulator Kits are part of a complete line of fuel system products. The included 12-887 regulator features a die cast aluminum body and a chrome top for corrosion resistance and good looks. The regulator contains 3/8″ NPT in/out ports, a 3/8″ NPT return port, a 1/8 NPT gauge port. In addition, 3 Mr. Gasket® 3/8 NPT to -6 AN fittings, a barbed fitting for the vacuum port, a mounting bracket, and all necessary hardware are also included. Holley 12-887KIT Die Cast Carbureted Fuel Pressure Regulator Kit – Black. Black regulator is adjustable from 4.5-9 psi for precise fuel pressure adjustments. Constructed of die cast aluminum with a black anodized base and clear anodize top for good looks. Used in systems where a return line is not needed. Use with electric or mechanical pumps. Regulator has one 3/8″ NPT inlet, two 3/8″ NPT outlets, and 1/8 NPT gauge port. Gasket 3/8 NPT to -6 AN fittings (481666-BL x3). Includes 1/8 NPT Gauge Port and Earl’s Fuel Pressure Gauge (100187ERL). ATV, UTV, Motorcycle & Marine. Audio & Mobile Electronics. Books, Literature & Videos. Engine & Engine Components. Lifestyle, Clothing & Memorabilia. Oil, Fluids, & Chemicals. Tools & Shop Equipment. Trailer, Towing & Winches.