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Fuel pressure regulator fittings


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looking at this last night to order new fittings, the rail feed adaptor at the end is 8 mm and i have a an8 fitting for it, the return line is 6 mm so do I need a an6 fitting and 6mm internal diameter fuel line for the return and 8mm internal for the feed ? :)

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13mm thread is a very odd size as per that picture. I’ve never seen a m13 > an-6 adapter unless they have their measurements wrong.

With all due respect, I wouldn’t fit that regulator to my car. I’d source a genuine Sard/FuelLab/Aeromotive etc that you can also get the correct fittings for. It’s not worth cutting corners on something that maintains a fuel supply.. 

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