SPDZ1 Upgraded LS Ignition Coil Harness – Sold Per Cylinder Head (One Side)
Upgrade your LS engine with the SPDZ1 Ignition Coil Harness, engineered with better-than-stock wiring for improved durability and performance. Whether you’re replacing a worn factory harness or preparing for an engine swap, this harness delivers reliability you can trust.
Built with factory-style connectors and weatherproof rubber seals, it ensures a secure, moisture-resistant connection for long-term use in demanding environments. Perfect as a replacement, an upgrade, or a spare to keep on hand for your LS project.
Key Features:
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Designed for GM LS engines
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High-quality wiring – stronger than OEM
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Factory-style connectors for plug-and-play fitment
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Weatherproof rubber seals for maximum protection
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Ideal for replacements, upgrades, or engine swaps
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Sold per cylinder head (per side)
Get the dependable performance your LS build deserves with the SPDZ1 Ignition Coil Harness.
Compatibility:
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Guaranteed fit with GM coils: D510C (12570616) and D514A (12573190)
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May also work with: D581 (12558693), D585, D513A (12570616), MSD 8287, 12619161
⚠️ Important: Always double-check connections to confirm fitment with your specific factory harness and ignition coils.