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Instruction Sheets for Part Number HLY-558-502
Holley EFI Systems Wiring Harnesses
Fuel Injection System Wiring Harnesses, Holley EFI, GM LS 58X Crank Sensor, Power, Bosch Injector, Main Harnesses, for HP, Dominator ECUs, Kit
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Estimated Ship Date: Nov 10, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
558-502
Part Type:
Product Line:
Summit Racing Part Number:
HLY-558-502
Item Number:
3452670
UPC:
090127721339
Fuel Injection Style:
Multi-port
Quantity:
Sold as a kit.
Notes:
For 58x reluctor engines and Bosch-style injectors. You will need to purchase an ECU and O2 sensor to make a complete kit.
Holley EFI Systems Wiring Harnesses
Holley offers a variety of direct replacement EFI wiring harnesses, including multi-port, sequential, and throttle body injection styles. These units are made with premium components to ensure better reliability and performance for your ride--and they're compatible with many engine swaps. Holley EFI systems wiring harnesses are sold individually or as a kit; choose the model needed for your fuel injection application.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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