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

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.

• 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.