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.
Aluminum 4150 to 4500 CNC Machined Carburetor Spacer w/ Burst Panel Check Valves
Aluminum 4150 to 4500 CNC Machined Carburetor Spacer w/ Bust Pannels
2 Inch Open Blend 4150 Intake to 4500 Carburetor Adaptor
2 Inch Tapered Blend 4150 Intake to 4500 Carburetor Adaptor
4150 HOLLEY CARBURETOR TO 4500 MANIFOLD ADAPTOR, 1" HIGH, CARBY SPACER
Dual Rotation 4150 to 102mm or 92mm LS Throttle Body Adapter 3/4 6061 Aluminum
