These nitrous Speedmaster check valve spacers serve two distinct functions. Our check valves eliminate the need to replace the burst panels if you should have a backfire. Never replace burst panels again.
Wilson Manifolds 7030 Carb Adapter - 4150 To 4500 Flange
2 Inch Open Blend 4150 Intake to 4500 Carburetor Adaptor
2 Inch Tapered Blend 4150 Intake to 4500 Carburetor Adaptor
Holley Blue Non Stick Metering Block Gasket 2300. 4150, 4160, 4500 - Five Pack.
Holley Blue Non Stick Metering Block Gasket 2300. 4150, 4160, 4500 - Ten Pack.
Holley Blue Non Stick Metering Block Gasket 2300. 4150, 4160, 4500 - 25 Pack.
