Holley EFI HP ECU & Harness Kit — LS1/LS6, NTK O2 Sensor, 24x Reluctor

SKU: GVMR_550-602N
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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

Unleash LS1/LS6 Potential with Holley EFI HP ECU & Harness Kit

Gain ultimate control over your GM LS1/LS6-Series engine with the powerful Holley EFI HP ECU & Harness Kit. This comprehensive engine management system provides unparalleled tuning capabilities, allowing you to optimize every aspect of your engine's performance. Designed specifically for 24x reluctor wheel LS1/LS6 engines, this kit is the cornerstone for serious performance builds and swaps.

Advanced Engine Control and Precision Tuning

The Holley HP EFI Engine Control Module (ECU) is renowned for its robust processing power and extensive feature set, supporting a wide array of engine configurations and power adders. This kit includes a high-quality NTK Oxygen Sensor, ensuring accurate and rapid air/fuel ratio feedback for precise tuning. The included wiring harness is meticulously designed for a clean and straightforward installation, minimizing complexity and maximizing reliability.

  • ECU Type: Holley HP EFI
  • Engine Fitment: GM LS1 / LS6-Series (24x Reluctor Wheel)
  • Oxygen Sensor: NTK Wideband O2 Sensor
  • Components: ECU, Wiring Harness, NTK O2 Sensor
  • Capabilities: Advanced tuning, data logging, power adder support

Complete Solution for LS Performance

Whether you're building a high-horsepower race car or a finely tuned street machine, the Holley EFI HP ECU & Harness Kit provides the flexibility and control you need. From fuel and ignition timing to idle control and fan activation, every parameter is at your command. Experience improved drivability, enhanced power output, and the peace of mind that comes with a state-of-the-art engine management system. This kit is your all-in-one solution for maximizing the potential of your LS1 or LS6 engine.

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

Unleash LS1/LS6 Potential with Holley EFI HP ECU & Harness Kit

Gain ultimate control over your GM LS1/LS6-Series engine with the powerful Holley EFI HP ECU & Harness Kit. This comprehensive engine management system provides unparalleled tuning capabilities, allowing you to optimize every aspect of your engine's performance. Designed specifically for 24x reluctor wheel LS1/LS6 engines, this kit is the cornerstone for serious performance builds and swaps.

Advanced Engine Control and Precision Tuning

The Holley HP EFI Engine Control Module (ECU) is renowned for its robust processing power and extensive feature set, supporting a wide array of engine configurations and power adders. This kit includes a high-quality NTK Oxygen Sensor, ensuring accurate and rapid air/fuel ratio feedback for precise tuning. The included wiring harness is meticulously designed for a clean and straightforward installation, minimizing complexity and maximizing reliability.

  • ECU Type: Holley HP EFI
  • Engine Fitment: GM LS1 / LS6-Series (24x Reluctor Wheel)
  • Oxygen Sensor: NTK Wideband O2 Sensor
  • Components: ECU, Wiring Harness, NTK O2 Sensor
  • Capabilities: Advanced tuning, data logging, power adder support

Complete Solution for LS Performance

Whether you're building a high-horsepower race car or a finely tuned street machine, the Holley EFI HP ECU & Harness Kit provides the flexibility and control you need. From fuel and ignition timing to idle control and fan activation, every parameter is at your command. Experience improved drivability, enhanced power output, and the peace of mind that comes with a state-of-the-art engine management system. This kit is your all-in-one solution for maximizing the potential of your LS1 or LS6 engine.

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

Unleash LS1/LS6 Potential with Holley EFI HP ECU & Harness Kit

Gain ultimate control over your GM LS1/LS6-Series engine with the powerful Holley EFI HP ECU & Harness Kit. This comprehensive engine management system provides unparalleled tuning capabilities, allowing you to optimize every aspect of your engine's performance. Designed specifically for 24x reluctor wheel LS1/LS6 engines, this kit is the cornerstone for serious performance builds and swaps.

Advanced Engine Control and Precision Tuning

The Holley HP EFI Engine Control Module (ECU) is renowned for its robust processing power and extensive feature set, supporting a wide array of engine configurations and power adders. This kit includes a high-quality NTK Oxygen Sensor, ensuring accurate and rapid air/fuel ratio feedback for precise tuning. The included wiring harness is meticulously designed for a clean and straightforward installation, minimizing complexity and maximizing reliability.

  • ECU Type: Holley HP EFI
  • Engine Fitment: GM LS1 / LS6-Series (24x Reluctor Wheel)
  • Oxygen Sensor: NTK Wideband O2 Sensor
  • Components: ECU, Wiring Harness, NTK O2 Sensor
  • Capabilities: Advanced tuning, data logging, power adder support

Complete Solution for LS Performance

Whether you're building a high-horsepower race car or a finely tuned street machine, the Holley EFI HP ECU & Harness Kit provides the flexibility and control you need. From fuel and ignition timing to idle control and fan activation, every parameter is at your command. Experience improved drivability, enhanced power output, and the peace of mind that comes with a state-of-the-art engine management system. This kit is your all-in-one solution for maximizing the potential of your LS1 or LS6 engine.

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