Holley Terminator X Max 24x LS Engine & 6L80 Control System

Bring Modern Performance to Your LS Swap

Take complete control of your LS-powered project with the Holley Terminator X Max 24x LS Engine & 6L80 Control System. Designed for early 24x LS engines, this complete engine management package gives you everything needed to run your engine while seamlessly controlling a GM 6L80 or 6L90 automatic transmission.

Whether you're building a classic truck, Pro Touring muscle car, street rod, Jeep, or custom restomod, the Terminator X Max delivers OEM-like drivability with the flexibility to tune your combination for daily driving, towing, autocross, or high-performance street use.

No factory ECM. No complicated wiring. No guessing.

Just modern engine management built specifically for your LS swap.

Why Choose the Terminator X Max?

The Terminator X Max combines Holley's legendary self-learning EFI with advanced transmission control, giving you complete command over both your engine and your 6L80/6L90 automatic transmission from one powerful system.

Monitor real-time engine data, adjust transmission shift points, fine-tune torque converter lockup, and optimize performance—all through the included handheld touchscreen.

Whether you're cruising across town or putting your build through its paces, the Terminator X Max provides smooth operation, quick throttle response, and the tuning flexibility serious builders demand.

Package Includes

✔ Holley Terminator X Max ECU

✔ Complete Plug-and-Play LS Engine Wiring Harness

✔ Bosch Wideband Oxygen Sensor

✔ 3.5" Handheld Touchscreen Programmer

✔ 6L80 / 6L90 Transmission Control

✔ Transmission Wiring Harness

✔ CAN Communication Hardware

✔ OBD-II Programming Interface

✔ Installation Hardware

✔ Base Calibration to Get You Started

Features

• Self-learning EFI calibration
• Controls GM 6L80 & 6L90 automatic transmissions
• Supports naturally aspirated and boosted applications
• Fully programmable ignition timing
• Adjustable shift scheduling
• Torque converter lock-up control
• Cooling fan control
• Data logging and diagnostics
• Real-time handheld monitoring
• Drive-by-wire support on applicable applications
• Laptop tuning capability
• Designed for street, performance, towing, and race applications

Perfect For

• LS Engine Swaps
• C10 Trucks
• Squarebody Chevrolet & GMC
• Tri-Five Chevrolets
• Camaro
• Chevelle
• Nova
• El Camino
• Corvette
• F100
• Bronco
• Jeep LS Swaps
• Restomods
• Street Rods
• Pro Touring Builds
• Custom Fabrication Projects

Engine Compatibility

Designed for 24x LS engines with a 1x cam sensor, including many popular GM truck and performance engines.

Common applications include:

• 4.8L LR4
• 5.3L LM7
• 5.3L L59
• 6.0L LQ4
• 6.0L LQ9
• LS1
• LS6

Not compatible with 58x crank reluctor engines. If you have a 2006+ Gen IV LS engine, contact our sales team for the correct Terminator X Max system.

Transmission Compatibility

Compatible with:

• GM 6L80
• GM 6L90

Ideal for custom builds, LS conversions, Pro Touring cars, muscle cars, street rods, and classic trucks using electronically controlled 6-speed automatic transmissions.

Why Buy From Twisted Torque?

At Twisted Torque, we don't just sell parts—we help build complete drivetrain solutions.

Need a transmission to match?

Pair this system with one of our:

• Street™ 6L80 – Daily driving & towing
• Pro™ 6L80 – Performance street & heavy-duty applications
• Punisher™ 6L80 – High horsepower & competition builds

Our team can also help you choose the correct torque converter, transmission cooler, flexplate, crossmember, and supporting components to complete your swap with confidence.