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Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ]

$105.99 $339.99 -69%

Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ] Kit Introducing the Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ] Kit, a comprehensive solution for your LS2, LS3, or LS7 engine. This high-performance kit includes an Engine Control Module, a Wiring Harness, and all

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Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ]

Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ] Kit

Introducing the Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ] Kit, a comprehensive solution for your LS2, LS3, or LS7 engine. This high-performance kit includes an Engine Control Module, a Wiring Harness, and all the necessary components for a seamless installation. Engineered for the GM LS-Series, this kit is designed to deliver superior power and efficiency to your vehicle.

Product Specifications and Technical Details

The Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ] Kit features an HP EFI system, compatible with a 58x reluctor wheel. This advanced system is engineered to provide precise fuel injection and ignition timing, ensuring optimal engine performance. The kit includes a full wiring harness, designed to connect all necessary components for a hassle-free installation. With its robust construction and high-quality materials, this kit is built to last and withstand the rigors of high-performance driving.

Practical Applications and Benefits

The Discover Holley 550-603 Ecu & Wiring Harness Ls2 Shop Now [3quPwCsZ] Kit is the perfect choice for both seasoned mechanics and DIY enthusiasts looking to upgrade their LS2, LS3, or LS7 engine. This kit offers numerous benefits, including improved engine performance, enhanced fuel efficiency, and increased horsepower. Whether you're modifying your vehicle for track days or daily driving, this kit will provide the reliability and performance you need. With its easy installation and user-friendly design, this kit is suitable for a wide range of applications and is sure to elevate your driving experience.

What Our Customers Say

February 5, 2026

Absolutely no complaints!

This is a really great and a very useful gadget.

- Kelli V..

February 5, 2026

Absolutely no complaints!

This is a very nice and a quality product.

- Eleanor S..

February 5, 2026

Absolutely no complaints!

A clear and definite upgrade.

- Nora R..

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