This Speed Engineering LS ignition coil harness connects to four ignition coils and plugs into the factory harness. It is sold individually.
⚠️ Important Notes:
- Works with standard GM coils "D51OC" (12570616) and "D514A" (12573190)
- May also work with D581 (12558693), D585, D513A (12570616), MSD 8287, and 12619161 coils
- Double check the connections to confirm fitment with the factory harness and ignition coils
Features:
- Connects to 4 Ignition Coils
- Factory Harness Plug-In
- Compatible Coils: GM "D51OC" (12570616) and "D514A" (12573190)
- Sold Individually
FAQ
How many coils does this harness connect?
The harness attaches to four ignition coils.
Is this sold as a pair?
No. The harness is sold individually.
Which ignition coils does it work with?
It works with standard GM coils "D51OC" (12570616) and "D514A" (12573190), and may also work with D581 (12558693), D585, D513A (12570616), MSD 8287, and 12619161 coils.
Does it plug into the factory harness?
Yes. It is a factory harness plug-in, but the connections should be checked to confirm fitment with the specific harness and coils being used.
Is this part street legal?
No. Speed Engineering sells this ignition coil harness as a race-only product intended for competition use only. Installation on a street-driven vehicle may violate the Clean Air Act (42 U.S.C. 7522(a)(3)).
⚠️ Race Use Only: This product is manufactured and sold for installation on vehicles used solely for competition. Once installed, the vehicle may not be used, registered, or licensed for use on a public road or highway. Installation on a street-driven vehicle may violate the Clean Air Act 203(a)(3), 42 U.S.C. 7522(a)(3).

