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Alex Hayley · 11-04-2011, 12:17 PM

There are a lot of questions in this forum about fuel line size but I wanted to ensure I understand what sizes are being discussed. I have a 406 that is pushing 525hp and am re-addressing my fuel line. Most say that 3/8" fuel line is adequate. Would that be 3/8" inside diameter or outside diameter? 3/8" OD is easy to find locally...3/8" ID not so much.

11-04-2011, 12:17 PM	#1
Alex Hayley Registered User Join Date: Jul 2000 Location: NC Posts: 987	fuel line size There are a lot of questions in this forum about fuel line size but I wanted to ensure I understand what sizes are being discussed. I have a 406 that is pushing 525hp and am re-addressing my fuel line. Most say that 3/8" fuel line is adequate. Would that be 3/8" inside diameter or outside diameter? 3/8" OD is easy to find locally...3/8" ID not so much.