Log in / Sign up for our dedicated apps
VHP LT to GSI Conversion

Built to Work
VHP LT to GSI Conversion

  • Availability
  • Emissions
  • Flexibility

By choosing a rich-burn conversion solution during your next Waukesha* engine overhaul

You can not only reduce your engine's emissions, but also increase uptime and improve operational flexibility.

VHP LT to GSI Conversion (INNIO)

Make sure this upgrade is compatible with your engine:

What can this upgrade do for you?

  • Reduce oil consumption by up to 55%.
  • Up to 95% lowered emissions without lowered performance—site up to 90% more horsepower with a LT to GSI conversion2
  • ESM* engine system manager with emPact control solution maintains emissions in specified range with little to no operator intervention, using only 3% of the tuning time of other systems3
  • Wider full torque turndown range available: 750 rpm minimum for L5794GSI vs. 1000 rpm minimum for L5794LT
  • Improved altitude performance with no derate up to 8,000 feet at 100F for L5794GSI4

2 Assumes 0.3g/bhp-hr CO and NOx emissions reduction from from 3 to 0.15 g/bhp-hr at Title V limited sites.
3 Assumes 15 minute (if necessary) adjustment period for emPact vs. 8 hours for legacy AFR controls.
Compared to 5,000 feet for L5794LT.

VHP LT to GSI Conversion 2

How we get you there?

Kit includes:

  • Series Four* cylinder head kit
    Flex-head valve technology, SPARC system, oil header.
  • Power cylinder conversion
    Includes pistons, rings, liners, and other components.
  • Air system conversion
    Includes turbocharger, wastegate, advanced breather, and other components.
  • Controls upgrades
    Includes ESM/ESM calibration, AFR2 air-fuel ratio system, and other components.

Waukesha Power Cylinder VHP LT to GSI Conversion Waukesha_Series 4 Cylinder Head_300x300

Find your version:

LT to GSI:


Stage III / Stage III Plus¹

Series Four Cylinder Head Rebuild Kits / reUp heads
New Piston
Advanced breather

¹ Requires increasing cylinder bore

  • Waukesha Engine Upgrades

    In-person and virtual training courses and programs are designed to make it easier for both first-time operators and experienced technicians to assimilate knowledge quickly and improve engine productivity long-term.

  • reUp Remanfactured Engines & Parts

    To increase performance, reUp remanufactured core parts program for Jenbacher* and Waukesha* gas engines delivers genuine OEM parts that meet exacting standards and specifictions at a fraction of the cost of new core parts.

  • Find Solutions, Parts, and Service

    Waukesha’s growing network of distributors, packagers and technicians provide end users with the freedom to choose the right partner to service equipment and provide ongoing support – all backed by Waukesha Engine’s commitment to service and support.

  • Certified & Customer-Focused Training

    In-person and virtual training courses and programs are designed to make it easier for both first-time operators and experienced technicians to assimilate knowledge quickly and improve engine productivity long-term.

Built to Work


with enhanced reliability, availability and efficiency.


with extended service intervals and comprehensive engine upgrades.


with enhanced controls and performance improvements through data analytics.


At Waukesha, we’re working every day to design and build engines and programs that help power your tomorrow.



  • INNIO headquarter Jenbach

    Olaf Berlien becomes new CEO of gas engine Manufacturer INNIO

  • Bud Hittie

    INNIO Waukesha Poised to Play Major Role in Clean Energy Future

  • P48 Article Image

    1MW P48SE Launches Q1 2021

  •  Our Legacy Video Screen Grab

    Waukesha Gas Engines - Our legacy is your future video launch

  • INNIO Waukesha Crusoe Site Picture

    INNIO Waukesha brings electrical power to remote stranded gas locations, powers innovative Crusoe Digital Flare Mitigation® deployments

  • Pier Parisi,Vice President of Sales and Service for INNIO Waukesha

    INNIO Waukesha Announces Pier Parisi as New Vice President of Sales and Service for Waukesha Gas Engines Business

  • Front View of a Waukesha 275GL Plus Gas Engine / branded

    American Oil & Gas Reporter Features Waukesha Engines

  • 275GL+w/ESM2 in Welland

    Webinar: Waukesha's powerful new 275GL+ w/ ESM2


Be the


Sign up for Waukesha's Customer Portal to receive ongoing insights, product innovations and more.


sign up



Send us a message and we’ll contact you to start the conversation.


send a note

The Chatbot that we use at our website uses cookies categorized as "Chatbot Cookies". If you click on "START CONVERSATION", you will accept usage of cookies from the category "Chatbot Cookies" and start using the Chatbot. If you want to learn about cookies that we use on our website, please visit the Privacy Preferences Center.

Start Conversation