Holley EFI Systems Main Wiring Harnesses 558-503

Name: Holley EFI Systems Main Wiring Harnesses
Brand: Holley
SKU: HLY-558-503
Price: 899.95 USD
Availability: InStock
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Part Number: HLY-558-503

$899.95

Holley EFI Systems Main Wiring Harnesses

Fuel Injection System Wiring Harnesses, Holley EFI, Includes Stealth Ram/TPI Main, Power, Injector Harnesses, for HP, Dominator ECU, Chevrolet, Kit
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Holley EFI Systems Main Wiring Harnesses 558-503

HLY-558-503

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Part Number: HLY-558-503

Estimated Ship Date: Oct 19, 2026

$899.95

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Estimated Ship Date: Oct 19, 2026 Would you rather pick it up?

Overview

Brand:

Holley

Manufacturer's Part Number:

558-503

Part Type:

Fuel Injection System Wiring Harnesses

Product Line:

Holley EFI Systems Main Wiring Harnesses

Summit Racing Part Number:

HLY-558-503

UPC:

090127721346

Fuel Injection Style:

Multi-port

Metering Style:

Speed density

Quantity:

Sold individually.

Notes:

Includes Stealthram/TPI main harness, main power harness, injector harness, HEI ignition harness, ignition adapter, and tachometer input. Works with HP or Dominator ECU's.

Holley EFI Systems Main Wiring Harnesses

Choose EFI main power wiring harnesses from Holley to meet your needs. Several choices are offered—TBI, LS applications, multi-point, and un-terminated harnesses—to feed and carry your engine's electrical supply. Get wired for electronic fuel injection with Holley EFI systems main wiring harnesses.

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