Fuel line part number

Yes.

The CIS line for the #8 cylinder on a MondialQV is 118574 (per Maranello Concessionaires):

https://www.ferrariparts.co.uk/part/ferrari/118574

 

You can also replace the black part of the line if that is the issue. Unobtanium Supply sells a tool to press the line on $97 & the line as well. It may be less (tool & short piece of line) and you will have the ability to repair or replace any line now.
I use there tool all the time to replace hard plastic fuel injection lines.
http://www.unobtaniumsupply.com/UnobtainiumSupply_Product_List.PDF

 

Also any local shop that makes hydraulic hoses can replace the flexible lines, using your existing end fittings, by crimping on a new line. When I owned a Mondial I had all of them done for short money.

 

Doing One .....

Assume they are ALL BAD.


Replace ALL the PLASTIC in those fuel lines.

It is something like 12+/- lines In-Toto.