Conversion, modification and upgrade solutions

Increase lifecycle and reduce maintenance cost with Waukesha S2 to S4 conversion program

Take advantage of our certified S2 to S4 conversion program to increase the lifecycle of your Waukesha engine. Customers have experienced lifecycle extensions of up to 60% and increasing BHP while lowering maintenance costs.

Interested in lower maintenance costs? Please complete our simple request form and one of our qualified representatives will contact you shortly.



With decades of experience and state-of-the-art facilities across US and Canada, WPI offers conversion, modification and upgrade solutions for a wide range of Waukesha engines.

Conversions are performed by qualified technicians and use certified OEM parts.

Programs include but not limited to:

  • Waukesha VHP S2 engine with S4 technology
  • Advanced Crankcase Breather Upgrade for Waukesha VHP gas engines
  • ESM engine system manager control upgrade for Waukesha engines
  • Waukesha Series 2 VHP gas engines lean-burn upgrade
  • VHP AFR2 Air-fuel ratio control for Waukesha rich-burn gas engines
  • emPact Emission Control System Upgrade
  • VGF Lean-Burn Cylinder Head Upgrade