On the wiki page: P1S Abrasive Filament Extruder Upgrade Guide | Bambu Lab Wiki
the following is stated (with video showing how):
" * Complete Units: Buy a full hardened steel extruder gear and hotend assembly (ensure you choose the one for P1 Series). This is a bit more expensive but gives you spare stainless steel parts (the originals) in case something fails later. It’s also the quickest upgrade since you swap out the hotend easier."
But the link does not take you to the “full hardened steel extruder gear and hotend assembly” but to a combo with the gear separate and the hotend separate. This would require disassembling the extruder to swap out the gear.
This needs to be fixed on the wiki, so we can find the elusive full hardened steel extruder gear and hotend assembly", or the photos on the linked parts page need to reflect the entire extruder assembly not just the gear.
I would like to upgrade my P1Ss, but I don’t necessarily want to disassemble the extruder to replace the gear (depending on the cost difference which I cannot compare without the full assembly price).
If I understand what you are saying correctly, you are trying to find the complete hotend assembly and not just the gear/nozzle combo. From what I can tell, the only difference between the full hotend assembly and the other option is that one has a heat break fan and the other doesn’t, which the pictures I obtained from this tiny little image in the corner
There is no full assembly where you swap out the entire tool head, you still have to take apart the tool head to change the gears out. It doesn’t really matter which kit you buy as the old nozzle you are currently using should have a swappable heat break fan to put on the new kit without one, saving you $17.
Also FYI if you are just swapping to a hardened steel nozzle for not printing abrasives and only for longevity with materials like PLA, you don’t need to replace the extruder gears.