Edelbrock/Russell 650380 Billet Aluminum Fuel Y-Block Race blocks utilize large 1/2" NPT inlets with either 3/8" NPT or 1/2" NPT outlet ports for maximum flow applications Features a 1/8" NPT pressure gauge port Anodized red for a great appearance 1/2" inlet and outlet All blocks feature a 1/8" NPT pressure gauge port and are anodized red for a great appearance