Hobert62 Posted August 2, 2016 Share Posted August 2, 2016 Running plastic fuel lines to and from the fuel tank on my B. It has a 673n/a what sizes should I run? Smaller diameter on return side to aid in building pressure in pump? 5/8" supply and 1/2" return seams pretty big. Maybe 1/2" and 3/8"? Quote Link to comment Share on other sites More sharing options...
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