According to us, the most professional regulator in the market. Very fast response and stable pressure in case of dramatic changes such as full throttle, charge pressure and changes. Ready to "bypass" a lot of fuel when using high flow pumps AN10 In Ports and AN8 Return Port Hardened steel ball and replaceable steel seat, 7,13mm return hole 1/8 "NPT gives port 1/8 "NPT inlet pressure reference port Compatible with gasoline, ethanol and methanol Mil-Spec anodised upper part has translucent anode Delivered without nipples