Holley EFI
Built for your HEMI platform, our Holley EFI collection offers a range of aftermarket fuel system parts designed to enhance power delivery, throttle response, and overall engine efficiency. Whether you’re upgrading a 5.7L, 6.1L, 6.4L, or 6.2L HEMI, these EFI components are engineered to support high-performance builds and reliable tuning.
In this category, you’ll find everything from fuel injection systems and controllers to sensors and wiring harnesses—each selected to optimize your engine’s fuel management and maximize drivability. Holley EFI parts provide precise fuel control and adaptability, helping you unlock the full potential of your HEMI-powered vehicle.
- Complete EFI systems and controllers
- Fuel pumps and regulators
- Sensors and wiring accessories
- Tuners and software support
Shop Holley EFI upgrades for your HEMI platform at FastHemis.
Holley EFI Hi-Flow Billet Fuel Rails: Dodge / Ram 5.7L / 6.1L / 6.4L 2003 - 2021
Holley EFI
Regular price
$299.95
$265.95
Sale
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold - 95mm LS Style Throttle Body - Black: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.1L SRT8, 6.4L 392 / SRT8 / SRT) 2005 - 2020
Holley EFI
Regular price
$1,631.95
$1,449.95
Sale
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Holley EFI Billet Aluminum Intake Manifold Adapter Plates - Early Small Intake Port: Chrysler / Dodge / Jeep / Ram 5.7L Hemi 2003 - 2008
Holley EFI
Regular price
$479.95
$425.95
Sale
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Holley EFI Coolant Temperature Sensor (CTS, Molex 2 Cavity, Female): Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014
Holley EFI
Regular price
$13.61
$12.10
Sale
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Holley EFI Drive-By-Wire Dual Throttle Body Harness: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014
Holley EFI
Regular price
$449.95
$399.95
Sale
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Holley EFI Gen III Hemi Smart Coils (Single Coil) - Black: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014
Holley EFI
Regular price
$127.95
$54.95
Sale
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Holley EFI Gen III Hemi Coil Harness - Late Coils: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (for HP EFI & Dominator EFI)
Holley EFI
Regular price
$233.95
$207.95
Sale
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Holley EFI Gen III Hemi Drive-By-Wire Harness - Late Pedal (Compact Molex Connector): Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (for 0459 1847 Throttle Body)
Holley EFI
Regular price
$299.95
$265.95
Sale
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Holley EFI Gen III HEMI Drive-By-Wire Harness: Chrysler 300 (05-15) / Dodge Ram 1500 (03-10) - Black
Holley EFI
Regular price
$321.95
$285.95
Sale
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Holley EFI Gen III Hemi Coil Harness - Early Coils: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (for HP EFI & Dominator EFI)
Holley EFI
Regular price
$224.95
$199.95
Sale
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold - 105mm LS Style Throttle Body - Black: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.1L SRT8, 6.4L 392 / SRT8 / SRT) 2005 - 2020
Holley EFI
Regular price
$1,743.95
$1,164.95
Sale
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base - As Cast: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.1L SRT8, 6.4L 392 / SRT8 / SRT) 2005 - 2020
Holley EFI
Regular price
$1,124.95
$999.95
Sale
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold Base: Fits Dodge / Chrysler / Jeep / Ram (05-26) - Black
Holley EFI
Regular price
$1,181.95
$1,049.95
Sale
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold: 5.7L (2009+) / 6.1L (05-10) / 6.4L (2011+) - Black
Holley EFI
Regular price
$1,743.95
$1,164.95
Sale
- Unit price
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold - 80 and 92mm Mopar Style Throttle Body - As Cast: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014
Holley EFI
Regular price
$1,518.95
$1,349.95
Sale
- Unit price
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Holley EFI Gen III Hemi Hi-Ram EFI Manifold - 95mm LS Style Throttle Body - As Cast: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.1L SRT8, 6.4L 392 / SRT8 / SRT) 2005 - 2020
Holley EFI
Regular price
$1,518.95
$674.95
Sale
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Holley EFI Gen III Hemi Main Harness - Late w/ TPS and Idle Air Control - Cable Throttle Body: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (for HP EFI & Dominator EFI)
Holley EFI
Regular price
$956.95
$849.95
Sale
- Unit price
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Holley EFI Gen III Hemi Main Harness - Early w/ TPS and Idle Air Control - Cable Throttle Body: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014
Holley EFI
Regular price
$1,012.95
$899.95
Sale
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Holley EFI Gen III Hemi Smart Coils (8-Pack) - Black: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014
Holley EFI
Regular price
$843.95
$749.95
Sale
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Holley EFI Gen III Hemi V8 Injector Harness - Bosch/Jetronic and Holley Injectors: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (for HP EFI & Dominator EFI)
Holley EFI
Regular price
$224.95
$199.95
Sale
- Unit price
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Holley EFI Gen III Hemi VVT & SRV Plug and Play Harness: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (Use w/ Terminator X or Terminator X Max)
Holley EFI
Regular price
$195.95
$173.95
Sale
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Holley EFI Gen III Hemi VVT Harness: Chrysler 300 6.1L SRT8 & 6.4L 392 2006 - 2014 (Use w/ Terminator X or Terminator X Max)
Holley EFI
Regular price
$150.95
$133.95
Sale
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Holley EFI Terminator X Gen III Hemi Kit - EV1 Injectors: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.2L TRX / Hellcat / Trackhawk, 6.4L 392 / SRT8 / SRT) 2002 - 2026
Holley EFI
Regular price
$2,306.95
$2,049.95
Sale
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Holley EFI Terminator X Gen III Hemi Kit - EV6 Injectors: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.2L TRX / Hellcat / Trackhawk, 6.4L 392 / SRT8 / SRT) 2002 - 2026
Holley EFI
Regular price
$2,306.95
$2,049.95
Sale
- Unit price
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Holley EFI Terminator X Gen III Hemi Kit - EV6 Injectors: Chrysler / Dodge / Jeep / Ram 5.7L Hemi & 6.1L SRT8 2002 - 2010
Holley EFI
Regular price
$2,306.95
$2,049.95
Sale
- Unit price
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Holley EFI Terminator X Max Gen III Hemi - EV1 Injectors - Drive-by-Wire Throttle Body Control: Chrysler / Dodge / Jeep / Ram 5.7L Hemi & 6.1L SRT8 2002 - 2010
Holley EFI
Regular price
$2,699.95
$2,399.95
Sale
- Unit price
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Holley EFI Terminator X Max Gen III Hemi - EV1 Injectors - Drive-by-Wire Throttle Body Control: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.1L SRT8, 6.4L 392 / SRT8) 2002 - 2012
Holley EFI
Regular price
$2,699.95
$2,399.95
Sale
- Unit price
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Holley EFI Terminator X Max Gen III Hemi - EV6 Injectors - Drive-by-Wire Throttle Body Control: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.2L TRX / Hellcat / Trackhawk, 6.4L 392 / SRT8 / SRT) 2002 - 2026
Holley EFI
Regular price
$2,699.95
$2,399.95
Sale
- Unit price
- /per
Holley EFI Terminator X Max Gen III Hemi - EV6 Injectors - Drive-by-Wire Throttle Body Control: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.1L SRT8, 6.4L 392 / SRT8) 2002 - 2012
Holley EFI
Regular price
$2,699.95
$2,399.95
Sale
- Unit price
- /per
Holley EFI Terminator X Max Gen III Hemi - EV1 Injectors - Drive-by-Wire Throttle Body Control: Chrysler / Dodge / Jeep / Ram (5.7L Hemi, 6.2L TRX / Hellcat / Trackhawk, 6.4L 392 / SRT8 / SRT) 2002 - 2026
Holley EFI
Regular price
$2,699.95
$2,399.95
Sale
- Unit price
- /per
Holley EFI Terminator X Max Gen III Hemi - EV6 Injectors - Drive-by-Wire Throttle Body Control: Chrysler / Dodge / Jeep / Ram 5.7L Hemi & 6.1L SRT8 2002 - 2010
Holley EFI
Regular price
$2,699.95
$2,399.95
Sale
- Unit price
- /per
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Optimize Your HEMI Engine with Holley EFI Fuel System Upgrades
Holley EFI parts are engineered specifically for HEMI platforms, offering precise fuel control and advanced tuning capabilities. Whether you’re upgrading a 5.7L, 6.1L, 6.4L, or 6.2L HEMI, these components improve throttle response, power delivery, and overall engine efficiency for street, track, or race applications.
What are the key benefits of Holley EFI systems for HEMI engines?
Holley EFI delivers standalone engine management solutions that provide accurate fuel metering and ignition control. This results in smoother throttle response, better drivability, and the ability to fine-tune your engine for various performance goals. Their EFI platforms like Sniper, Terminator X, HP, and Dominator cater to everything from simple engine swaps to serious horsepower builds.
- Precise fuel and spark control for optimized combustion
- Adaptability to different HEMI engine sizes and configurations
- Improved throttle response and smoother power delivery
- Support for advanced tuning and data logging
How do I choose the right Holley EFI components for my HEMI build?
Selecting the right EFI parts depends on your engine size, build goals, and tuning experience. Complete EFI systems and controllers are ideal for full engine management, while individual components like fuel pumps, regulators, sensors, and wiring harnesses allow for targeted upgrades. Consider your vehicle’s intended use—street, track, or race—and whether you need software support and tuners to match your setup.
Tips for upgrading your HEMI’s fuel system with Holley EFI parts
Upgrading to Holley EFI components can unlock your HEMI’s full potential, but proper installation and tuning are critical. Start with a complete EFI system if you want comprehensive control, or upgrade individual parts to improve specific areas like fuel delivery or sensor accuracy. At FastHemis, we offer a full range of Holley EFI parts tailored to your HEMI platform to help you build a reliable and powerful fuel system.