SPDZ1 Upgraded LS Ignition Coil Harness – High-Performance Replacement (Sold Per Cylinder Head)
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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:
- Guaranteed fit with GM coils: D510C (12570616) and D514A (12573190)
- 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.
We understand that packaging condition can be important to collectors.
Unless otherwise stated in the product description, items listed as new are sold in unopened packaging. Packaging may show minor shelf wear, edge wear, small bends, scuffs, scratches, sticker residue, or other minor imperfections caused by manufacturing, retail handling, storage, or shipping.
Please review all available product photos carefully before purchasing. The photographs are an important part of the product description and help show the actual item's appearance and packaging condition.
Collectors looking for a particular card, box, blister, or packaging condition should contact us before ordering with any questions about a specific item.