NIsaacs
TDR MEMBER
I don’t have an ESN for a ‘99 or ‘00, but I do for a ‘98.5 and an ‘01. The crossover tubes are the same for both, 3944833.
Yes, all the injectors now use the same connector tubes. However, the 98.5 original equipped tubes were slightly different, so when you change injectors you need to change to the new style tubes.
Copy & paste from DAP's site:
"Please note that some 98.5 trucks will need connector tubes. If your engine serial numer is lesser than 56462598, you will be required to purchase them or your new injectors will not seal properly. Recommend with o-ring 3867043 (purchased separately.)"
https://www.dieselautopower.com/bosch-cross-over-fuel-connector-tube-f00zr20002