MSD Atomic 2 EFI TBI - Black

Redesigned from the ground up, the Atomic 2 EFI system now features an 865 CFM throttle body with integrated ECU, full color touch screen, simple 4-wire hookup, and several easy-to-use new features!

Part # 2910-2BK
Estimated Ship Date: 03/10/2023
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This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

See Emissions Details
The Atomic 2 EFI system from MSD features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 635 HP on forced induction applications. The Atomic 2 ECU is capable of fuel map self-learning and ignition timing control, improving idle stability, drivability, and wide-open throttle horsepower! Designed to fit on 4150 intake manifold, with ample clearance for factory air cleaners. The Atomic 2 EFI provides the performance and drivability benefits that you expect from fuel injection. Quick starts, smooth idle and great throttle response just to name a few. Combine the fact that the Atomic 2 will support ignition timing through the ECU and you have a win-win combination. Initial timing is handled through a compact handheld monitor where you simply answer a few car guy questions about your engine and you're off and running!


  • Direct replacement for common 4-barrel carburetors with 4150-style (square bore) flange
  • NEW Throttle Body Flows 865 CFM and features 1 ¾” Throttle Plates
  • NEW Booster design offers superior fuel atomization
  • NEW ECU is 100% incorporated into the throttle body – no separate Power Module to mount
  • NEW and Improved Calibration Wizard – Answer a few simple questions about your engine and it creates the base map, then starts tuning on its own! NO laptop required!
  • NEW High-Resolution, Full Color, 3.5” Touchscreen for Initial Setup, Tuning, and Gauge Displays
  • NEW Optional Laptop Tuneability – Ideal for fine tuning and unique engine combinations or for Boosted applications up to 21.5 PSI
  • IMPROVED Built in Nitrous Control supports wet/dry nitrous
  • Integrated ignition timing control – includes an ignition coil driver, no ignition box required
  • Only 4 Wiring Connections Required! (Battery +, Battery - , Switched Ignition & RPM)
  • NEW Black Ceramic Finish Option for durable, modern looks. Also available in raw aluminum
  • NEW Higher Horsepower Rating - Supports up to 650 HP Naturally Aspirated or 635 HP Forced Induction with Four 100 Lb/Hr Injectors
  • Roller bearing throttle shafts for smooth throttle feel and less pedal effort
  • External fuel pressure regulator required, set to a base pressure of 58.5 PSI, such as Holley 12-882. (Only on PN 2910-2 and 2910-2BK).
  • Fuel pump control built-in with a 40 amp relay
  • Fan control eliminates the need for external fan controller, simply wire a relay to the fan and tell the Atomic 2 ECU the desired fan activation temperature
  • NEW OEM Style TPS/IAC and Fuel Pressure sensor, for years of dependable service and easy replacement
  • The included Genuine Bosch LSU 4.9 Wideband Oxygen Sensor provides real-time Fuel Map Learn!
  • NEW - Includes clamp-on oxygen sensor kit for simplified, leak free installation. Stainless Steel T-Bolt clamps and a Stainless Steel (Weldable) oxygen sensor bung included
  • NEW - Compatible with MSD, Holley Hyperspark and OEM Ignition Systems
  • NEW - Compatible with Holley EFI digital dashes, gauges and fuel system accessories

About Atomic

MSD’s Atomic EFI systems were designed with two goals; to simplify EFI and improve overall performance. Component integration resulted in easier installation and programming while advanced self-learning properties maximize your engine's output.

Brand Atomic
Emission Code3
Injector Size100 lb/hr @ 58.5 PSI
Product TypeEFI
Part Number2910-2BK

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle

Convert Your Carb to EFI with MSD’s New and Improved Atomic 2.0 Fuel Injection

*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.