Low pressure fuel lines

[StealBlueSHO]

Anyone know what the fuel line size is for the low side? Specifically the line between the HPFP and the firewall? 3/8? 5/16? I need a line and not sure which size to order..

 

[ZSHO]

If I had to guess would say 5/16" !  3/8 seems a bit on the high side for a Fuel line. Dunno.  Z

 

[StealBlueSHO]

Confirmed 3/8th. Did the whole put the wrench on it. 3/8th fits like a glove... the 5/16 couldn’t get on it.