The Jackpot 2 LS EFI System is a standalone engine management system for 1997–2014 GM Gen III and Gen IV LS-based engines that use 58x/4x or 24x/1x crank and cam trigger patterns. It’s perfect for LS swaps or for upgrading and replacing your factory ECU or existing aftermarket EFI, giving you modern sequential fuel and spark control, dual wideband closed-loop learning, and the flexibility to support everything from stock street builds to serious high-performance combinations.
Jackpot 2 LS is designed for builders who want the best of both worlds: a simple, guided setup that gets you running fast, plus true standalone ECU control that scales up to advanced tuning when your build demands it. Whether you are swapping a 5.3 into a classic truck, refreshing an LS3 street truck, or building a track-focused combo with aggressive cam timing and power adders, Jackpot 2 LS is built to keep the install clean, the drivability strong, and the control in your hands.
At the heart of the system is Aces’ 32-bit automotive-grade ECU architecture, built for stable RPM control, reliable input and output handling, and consistent performance across changing voltage and load conditions. For stock and mild builds, the setup wizard and self-learning fueling strategy help eliminate the intimidation factor of tuning. For serious performance builds, the free Aces laptop tuning software unlocks full manual control and calibration refinement.
What It Is - Jackpot 2 LS is a standalone ECU system that replaces the stock ECU and wire-harness or an existing aftermarket ECU & harness to control your LS engine’s fueling and ignition with modern wideband feedback and high-resolution mapping. It supports true sequential fuel and spark on compatible LS trigger patterns, closed-loop wideband control on both banks, and tunable strategies for performance features like nitrous and boosted combinations when configured correctly.
What It Fits - Jackpot 2 LS kit we offer is intended for 1997–2014 GM Gen III and Gen IV LS-based engines that use either of the following crank and cam trigger combinations:
- 58x/4x crank and cam pattern
- 24x/1x crank and cam pattern
- Cathedral port heads
- Drive by cable applications
Common compatible engines include LS1, LS2, LS3, LS6, LS7, LS9, and many popular LS swap variants such as 4.8L, 5.3L, and 6.0L LS-based engines. Compatibility is determined by the trigger pattern and engine features, not just the engine nickname, so confirming the crank and cam pattern is one of the best ways to validate fitment.
Transmission ControlTransmission Control Version: For builds where you want the ECU to control a compatible GM automatic transmission.
Supported GM transmissions (Transmission Control versions only):
- 4L60E (1996-2003)
- 4L65E (1996-2003)
- 4L67E (1996-2003)
- 4L80E (1994-2003)
- Transmission control can be deactivated if using a manual transmission, 700R4, TH350/400.
What’s Included With Every Standalone SystemEvery Jackpot 2 LS standalone system includes the core parts needed to run the engine and begin closed-loop learning, with options to match your build style.
Each standalone system comes with:
- The Jackpot 2 ECU
- A full LS wiring harness
- 5 inch handheld touchscreen unit
- Two wideband O2 sensors (for dual bank wideband control)
- Two weld-in O2 sensor bungs
- A coolant temperature sensor
- A PDM (Power Distribution Module)
- A MAP sensor
- Additional accessories (installation and sensor-related items)
- If you are buying a kit configuration that is not a standalone kit and comes with injectors, the harness and injectors are EV1 by default
- The harness always includes both 24x and 58x sub-harnesses, so you are covered for either trigger pattern supported by this system
- Midrise intake manifold
- Fuel rails, injectors and wiring harness
ACES LS Fuel Pressure Sensor Kit - When you need to log the pressure of your engine’s oil, fuel, and boost, don’t settle for less. Aces Fuel Pressure Sensor Kit includes everything you need to stay informed about the conditions inside your setup. It contains premium plastic/steel forged sensors with ⅛” -27 NPT threads, a -6 AN fuel pressure take-off adapter fitting, and two sets of 45 push lock hose ends. Easy compatibility with all Aces handhelds and dash screens allows you to display your data accessibly and record it effortlessly on your log files.
You May Also Need:Throttle Cable BracketsIn-Line Fuel Pump Kit with RegulatorTight Fit In-Tank Fuel Pump KitTank Conversion Fuel Pump KitGambler Distributor and CoilDual Plane Intake Manifolds
