Holley Modular Lo Ram EFI Manifold LS1 2 6 300 621BK charging and starting systems 4L V8 1981 Oldsmobile Delta blh 4L V8 1981 Oldsmobile Delta 88 Royale Brougham 267 4 Barrels 4 Billet Color Shiny with Red Billet Booster Annular Billet Insert w Skirt Brand Holley Carburetor Use Professional Race CFM 950 Choke None Circuit 2 Condition New Emission Code 4 Finish Shiny Fuel Gasoline Fuel Inlet Dual High Speed Air Bleed 36 Idle Air Bleed Size 63 Marine Use No Material Aluminum Model 4500 Needle and Seat Size 120 Intake design facilitates custom inlet duct and throttle body placement These intake manifolds will work with OE or aftermarket cylinder heads