I have some questions about whether or not my fass 95 series fuel system (red body) off of my 01 Cummins will work with my 04.5 Cummins. I've heard both yes and no. Thanks for any advice/answers

 

I think it would without any issues. Call FASS an check with them. You may need a new wiring harness/parts. Has your truck been retrofitted for the in tank fuel pump. If so, you will need a draw straw or sump also.

 

Thanks, I'll call fass. But the truck does have the in tank pump.

 

definitely need a draw straw or sump as Spooler suggested FASS pump will not be able to pull fuel from tank when there is in tank pump.