
Built to Work
VHP emPact Emission Control Upgrade
- Emissions
- Life
With the emPact emission control upgrade for Waukesha* VHP* gas engines, INNIO effectively combines all the emissions-related components of an engine into one comprehensive control system that can keep your emissions in compliance.
The system uses a special oxygen (O2) sensor specifically designed for natural gas operation and is factory-designed, tested, and calibrated to optimize the interaction between components, resulting in excellent system performance.

Make sure this upgrade is compatible with your engine:
What can this upgrade do for you?
- Automatically adjusts to achieve and maintain emissions compliance
- Lower catalyst-out emissions mean more allowable HP per site without triggering tons-per-year limits such as Title V
- Decreased potential for damage and increased catalyst life through differential pressure and temperature catalyst sensors
- Time and labor savings
How we get you there?
Key components included:
- Stainless steel catalyst housing
- Catalyst access door
- Catalyst wiring harness
- Heat shield
- Full authority fuel valve
- Post-catalyst oxygen sensor
- Pre-catalyst pressure sensors
- Post-catalyst pressure sensors
- Pre-catalyst temperature sensor (behind heat shield)
- Post-catalyst temperature sensor (behind heat shield)
- 4.5-inch color display panel Emission Control Module (ECM)
Find your version:
emPact (for engines converted to S4 GSI with ESM2)
F2895G |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
F2895GL |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
F2895GSI |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
F3521G |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
F3521GL |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
F3521GSI |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L5790G |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L5790GL |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L5790GSI |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L5794LT |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L7042G |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L7042GL |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
P9390GL/P9390GSI |
Option I |
emPact 0.15g NOx Catalyst System | ✔ |
L5794GSI |
Option I |
Option II |
Option III |
Option IV |
emPact 0.15g NOx Catalyst System2 | ✔ | ✔ | ✔ | ✔ |
AFR2 | ✔ | ✔ | ✔ | |
Wireway harnesses / Mounting brackets | ✔ | ✔ | ✔ | |
Ignition Coils w/ Integrated Harness | ✔ | ✔ | ✔ | |
Single fuel inlet piping | ✔ | ✔ | ✔ | |
Fuel Control Valves | ✔ | ✔ | ✔ | |
HMI | ✔ | ✔ | ✔ | |
O2 sensors | ✔ | ✔ | ✔ | |
Differential pressure wastegate system | ✔ | ✔ | ✔ | |
Conversion from Mooney gas regulators | ✔ | ✔ | ||
Power Distribution Box | ✔ | |||
Gas regulator springs | ✔ |
2Requires advanced breather
L7042GSI |
Option I |
Option II |
Option III |
Option IV |
emPact 0.15g NOx Catalyst System2 | ✔ | ✔ | ✔ | ✔ |
AFR2 | ✔ | ✔ | ✔ | |
Wireway harnesses / Mounting brackets | ✔ | ✔ | ✔ | |
Ignition coil harnesses | ✔ | ✔ | ✔ | |
Single fuel inlet piping | ✔ | ✔ | ✔ | |
Fuel Control Valves | ✔ | ✔ | ✔ | |
HMI | ✔ | ✔ | ✔ | |
O2 sensors | ✔ | ✔ | ✔ | |
Differential pressure wastegate system | ✔ | ✔ | ✔ | |
Conversion from Mooney gas regulators | ✔ | ✔ | ||
Power Distribution Box | ✔ | |||
Gas regulator springs | ✔ |
2Requires advanced breather
L7044GSI |
Option I |
Option II |
Option III |
Option IV |
emPact 0.15g NOx Catalyst System2 | ✔ | ✔ | ✔ | ✔ |
AFR2 | ✔ | ✔ | ✔ | |
Wireway harnesses / Mounting brackets | ✔ | ✔ | ✔ | |
Ignition Coils w/ Integrated Harness | ✔ | ✔ | ✔ | |
Single fuel inlet piping | ✔ | ✔ | ✔ | |
Fuel Control Valves | ✔ | ✔ | ✔ | |
HMI | ✔ | ✔ | ✔ | |
O2 sensors | ✔ | ✔ | ✔ | |
Differential pressure wastegate system | ✔ | ✔ | ✔ | |
Conversion from Mooney gas regulators | ✔ | ✔ | ||
Power Distribution Box | ✔ | |||
Gas regulator springs | ✔ |
2Requires advanced breather
Built to Work
Tougher
with enhanced reliability, availability and efficiency.
Longer
with extended service intervals and comprehensive engine upgrades.
Smarter
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.
OUR LEGACY IS YOUR FUTURE
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