LS3 Basic Installation Kit
  • 2950 LS3 EFI Kit
  • 2950 display
  • atomic_ls Engine

GM LS Atomic EFI Installation Kit

GM LS Basic EFI Installation System

SKU: TD-MSD-2957

The GM LS-based engine has been embraced by hot rodders, muscle car fans and racers alike.  However, trying to retrofit the factory EFI system into a street rod or muscle car creates a number of challenges from wiring to programming. Intimidating electronics and bulky wiring harnesses can quickly clutter the engine compartment and hurt the aesthetics of any hot rod. The massive factory ECU is not only a hassle to mount, but the sheer amount of wiring that goes along with it is simply overwhelming. MSD’s Atomic LS EFI systems are designed to eliminate the intimidation and clutter when installing aftermarket EFI on an LS engine.



  • Integrated Fuel Rails and ECU
  • Wiredless technology reduces wire
  • Self-Tuning
  • No Laptop



By integrating the ECU onto the fuel rails MSD has eliminated the bulky ECU and tangled mess of a wiring harness. The self-tuning technology of the Atomic system allows the average do-it-yourself hot rodder to easily wrap up an LS engine transplant. Initial setup is a breeze with the supplied handheld monitor and by simply answering a few car guy questions during the initial setup, your Atomic LS’d project will be ready to drive.

Installation Instructions Open

Self Tuning:Yes

User Tunable:Yes


Injection Style:Multi-port

Intake Manifold Included:No

Fuel Rails Included:Yes

Throttle Body Included:No

Injectors Included:No

Calibration Module Included:Yes

ECM Included:Yes

Wiring Harness Included:Yes

Oxygen Sensor Included:Yes

Fuel Pump Included:No

Fuel Pressure Regulator Included:No

Distributor Included:No

MAP Sensor Included:No

IAT Sensor Included:No

TPS Sensor Included:No

IAC Motor Included:No

Quantity:Sold as a kit.

Notes: Kits will not work with throttle by wire. Cable driven throttle bodies only.


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