Holley EFI Terminator X MPFI Kit with EV6 Injector Harness — Fits GM LS1/LS6

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SKU: GVMR_550-909T
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Sale price$1,258.95 Regular price$1,399.95
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Tuning for GM LS1/LS6 Engines

The Holley EFI Terminator X MPFI Kit is specifically tailored for the iconic GM LS1 and LS6 engines, offering a powerful and affordable solution for engine management. This kit is perfect for enthusiasts who want to move away from the limitations of the stock PCM and gain full control over their engine's performance parameters. With the included EV6 injector harness, installation is straightforward for those running modern fuel injectors.

Why Choose Terminator X for Your LS1/LS6?

  • Optimized for LS1/LS6: Specifically designed to handle the firing order and sensor inputs of the classic GM LS1 and LS6 platforms.
  • EV6 Injector Harness: Includes the correct harness for EV6-style fuel injectors, ensuring a secure and reliable connection for optimal fuel delivery.
  • Self-Learning EFI: The system automatically adjusts your fuel map based on real-time data, making it easier than ever to achieve a perfect tune.
  • Data Logging: Built-in data logging allows you to record engine performance, helping you diagnose issues or refine your tune for the track or street.
  • Compact ECU: The small, weather-resistant ECU can be mounted virtually anywhere in the vehicle, keeping your engine bay clean and organized.

Whether you are restoring a classic F-body or building a custom LS-powered vehicle, the Terminator X system provides the flexibility and power you need. Experience smoother idle, better throttle response, and increased reliability with this proven EFI solution. Take your build to the next level with the best parts available at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Tuning for GM LS1/LS6 Engines

The Holley EFI Terminator X MPFI Kit is specifically tailored for the iconic GM LS1 and LS6 engines, offering a powerful and affordable solution for engine management. This kit is perfect for enthusiasts who want to move away from the limitations of the stock PCM and gain full control over their engine's performance parameters. With the included EV6 injector harness, installation is straightforward for those running modern fuel injectors.

Why Choose Terminator X for Your LS1/LS6?

  • Optimized for LS1/LS6: Specifically designed to handle the firing order and sensor inputs of the classic GM LS1 and LS6 platforms.
  • EV6 Injector Harness: Includes the correct harness for EV6-style fuel injectors, ensuring a secure and reliable connection for optimal fuel delivery.
  • Self-Learning EFI: The system automatically adjusts your fuel map based on real-time data, making it easier than ever to achieve a perfect tune.
  • Data Logging: Built-in data logging allows you to record engine performance, helping you diagnose issues or refine your tune for the track or street.
  • Compact ECU: The small, weather-resistant ECU can be mounted virtually anywhere in the vehicle, keeping your engine bay clean and organized.

Whether you are restoring a classic F-body or building a custom LS-powered vehicle, the Terminator X system provides the flexibility and power you need. Experience smoother idle, better throttle response, and increased reliability with this proven EFI solution. Take your build to the next level with the best parts available at GGCRACING.

Product Details

Product Description

About Holley EFI

Holley EFI engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Holley EFI lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Tuning for GM LS1/LS6 Engines

The Holley EFI Terminator X MPFI Kit is specifically tailored for the iconic GM LS1 and LS6 engines, offering a powerful and affordable solution for engine management. This kit is perfect for enthusiasts who want to move away from the limitations of the stock PCM and gain full control over their engine's performance parameters. With the included EV6 injector harness, installation is straightforward for those running modern fuel injectors.

Why Choose Terminator X for Your LS1/LS6?

  • Optimized for LS1/LS6: Specifically designed to handle the firing order and sensor inputs of the classic GM LS1 and LS6 platforms.
  • EV6 Injector Harness: Includes the correct harness for EV6-style fuel injectors, ensuring a secure and reliable connection for optimal fuel delivery.
  • Self-Learning EFI: The system automatically adjusts your fuel map based on real-time data, making it easier than ever to achieve a perfect tune.
  • Data Logging: Built-in data logging allows you to record engine performance, helping you diagnose issues or refine your tune for the track or street.
  • Compact ECU: The small, weather-resistant ECU can be mounted virtually anywhere in the vehicle, keeping your engine bay clean and organized.

Whether you are restoring a classic F-body or building a custom LS-powered vehicle, the Terminator X system provides the flexibility and power you need. Experience smoother idle, better throttle response, and increased reliability with this proven EFI solution. Take your build to the next level with the best parts available at GGCRACING.

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