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1972 280SE 4.5 - fuel line sizes
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08-13-2007, 11:29 PM
bill4247
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Join Date: May 2001
Posts: 108
The official size is 7.5mm internal diameter. I have successfully used NAPA 5/16" aka 7.9mm fuel injection line. Do not use their ordinary 5/16" fuel line. May not stand the pressure. Actually I have found 7.5mm to be too tight a fit.
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