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Michigan Motorsports LS1/LS6 Ignition Coil Harness -Stock Location - Fits D580 Coils - Replaces GM #12558948 - Compatible with LS Engines Using Factory-Style Coil Brackets

4.7 (5) Write Review
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$42.99

$ 20 .99 $20.99

In Stock

About this item

  • Direct Replacement Coil Harness – Designed for LS1 and LS6 engines using D580 ignition coils, this harness restores proper coil function in stock-style coil bracket locations.
  • Replaces GM Part #12558948 – Offers OEM fitment and plug-and-play installation, making it ideal for factory replacements, harness repairs, or LS swap applications.
  • Designed for Stock Coil Mounting – Built to match original factory routing and plug positions, ensuring a clean, no-modification install on LS1/LS6 intake manifolds.
  • High-Quality Connectors and Wiring – Features heat-resistant wiring and factory-style terminals, providing long-term reliability and consistent ignition signal delivery.
  • Ideal for LS Rebuilds or Coil Harness Repair – Perfect for replacing cracked, frayed, or corroded ignition harnesses without rewiring the full engine harness.


Restore factory performance or complete your LS swap with this LS1 / LS6 Ignition Coil Harness designed for D580 coils in stock bracket locations. This harness is a direct replacement for GM part #12558948, making it the go-to solution for repairing a damaged harness or wiring up your LS engine using OEM-style ignition components. Engineered to work with LS1 and LS6 intake manifolds, this harness maintains factory-correct routing, plug spacing, and coil connector placement. It's perfect for OEM restorations, swap projects, or servicing an aging LS1-based platform where ignition signal loss or coil issues can stem from worn harnesses. Whether you're replacing brittle wiring or building a clean swap setup, this plug-and-play harness eliminates headaches and delivers OEM-style reliability you can count on.


Customer
Reviewed in the United States on April 5, 2025
It was perfect for my ls6 style foil packs. Installation was very easy with the wires labeled for each cylinder number.
Guardian1
Reviewed in the United States on March 9, 2024
It fit perfectly!!!
Yo mama
Reviewed in the United States on March 2, 2024
Good for 581 truck coils
Saskia Trent
Reviewed in the United States on December 2, 2024
Ordered a set of 2 ls1 coil pack harnesses paid for 2 received 1 emailed their customer support and they asked for an order number and now will not respond
Jake
Reviewed in the United States on December 13, 2024
I ordered a set and received one.