The ProFlex Commander for 1997-2015 GM LS Engine Swap (LSx) is a plug-and-play performance E85 flex fuel system giving your vehicle the ability to run E85, gas, or any blend right out of the box without the need to tune or switch maps. Please ensure that your build has injectors and a fuel pump setup that are capable of flowing full E85 before you install the system and begin using E85 fuel.

Due to the nature of swapping an engine there are many injector configurations. Please choose the configuration that you need for your build.

Please contact us if you if you have any questions. We are happy to assist you.

Use our iOS or Android app to connect to your ProFlex Commander!

Which ProFlex Commander Option Should You Choose?

Standard Commander

The Standard Commander is the go-to choice for stock or lightly modified vehicles running factory fuel injectors and naturally aspirated setups. If you haven’t upgraded your injectors or added forced induction (like a supercharger or turbo), this is the perfect fit.

• No tuning required
• Seamless flex fuel performance
• Ideal for street-driven and daily performance builds

Commander Pro

The Commander Pro is built for high-performance builds with upgraded fuel systems. If your vehicle has (or will have) aftermarket forced induction or larger fuel injectors (600cc / 60 lb/hr or bigger), the Pro is your move.

• Works with your current setup — and scales as you upgrade
• Recommended for turbocharged or supercharged builds
• Features more precise injector management for controlling big injectors.

Bottom line:
Got boost or big injectors? Go Pro.
If not, the Standard is all you need.

Which Fuel Sensor Do You Need?

Standard Sensor

The Standard Sensor delivers rock-solid ethanol content readings and is great for most stock or mildly modified fuel systems.

• Accurate ethanol % readings
• Reliable performance for daily and spirited driving
• No extra bells and whistles — just works

E-Sense Sensor Upgrade

The E-Sense is designed for modified fuel systems where precision and performance matter most.

• Higher flow capacity for high-horsepower builds
• Adds fuel temperature monitoring
• Unlocks real-time data in the ProFlex Connect app

Rule of thumb:
If your fuel system is stock, go Standard.
If it’s modified, go E-Sense.

What comes in the box:
-ProFlex Commander Unit for LS engine with Smartphone Connectivity
-Flex Fuel Sensor with fuel line and fittings for LS engine
-Plug-and-Play Wiring Harness for LS engine

The ProFlex Commander product line is backed by a limited 12 month warranty. Learn more.