Compatible with Holley 4150 style Carburetors with 9-5/16 Inch Centers; Fits Holley 4150 style carburetors with 9-5/16 inch center-to-center fuel inlet spacing. These fuel lines are not only great looking but are very functional. They incorporate a small, convenient 1-1/2 inch diameter fuel pressure gauge. The gauge is designed to read in 1/2 PSI (pounds per square inch) increments and has a range of 0-15 PSI. Inverted flare female inlet thread size 5/8-18.;.
Good price for this compared to others.fits double pumpers with duel metering blocks.has removable hose barb so you can change the size to your needs.the finish isn't the best but it's pretty good