Designed for connecting dual fuel hoses to your carburetor, these Y-style fuel blocks are engineered for optimum flow for both street and race applications. These blocks feature 3/8" NPT inlet and outlet ports. For maximum flow applications, our race blocks utilize large 1/2" NPT inlets with either 3/8" NPT or 1/2" NPT outlet ports. All blocks feature a 1/8" NPT pressure gauge port and are anodized red for a great appearance.