For Weber, Mikuni, O.E.R, SK & Delorto Carbs. Note: This regulator has a vent on the side that can be used as an optional boost reference (don't plug this hole since it is a vent when not using the boost reference feature).
Earl's 12850ERL Adjustable Fuel Pressure Regulator Carbureted Black 1-4 PSI
12850ERL Earl's Adjustable Fuel Pressure Regulator - Carbureted - Black - 1-4
