Skip to main content

Site Navigation


Product Page

This Guide relates to this Prusa i3 Upgrade Kit:


This is a co-development work with some awesome guys in the Prusa Community like Chris Warkocki, Grégorie Saunier (Bear Upgrades), Olof Ogland, Erik Bjorgan, Josh Jones, Kyle Wiehe, Marc Evertz, Matt Harrison, Ocie Ward, Sando Bendig, Vecko Kojchevski (Vecko Extruder), and last but not least Steven Mölby that have provided excellent feedback and suggestions of how to develop the "perfect" extruder setup for the Prusa series printer. A lot of work has been spent in this project and we have tried to listen to all the inputs in order to find a solution that can be fitted to a Prusa i3 MK2, MK2S, MK2.5 and MK3.


This kit contains the necessary parts to convert to our freshly designed extruder that uses 3:1 gearing ratio for improved precision and resolution, optimized geometry for the heat-sink cooling and many other improved features. It also reduces the moving weight to reduce vibrations and ghosting.


The upgrade is compatible with the following machines:

Prusa i3 MK2Prusa i3 MK2s
Prusa i3 MK2.5Prusa i3 MK3


Download and print out Bondtech’s PTFE cutting fixture for precise measurement of the tube length. STL file can be downloaded using the link in the Parts section below.

You will need :

Featured Document

Finish Line

Click To Open The Document Above

Right-click And "Save Link As" To Download