This Speed Engineering ignition coil set is a direct replacement for GM "D51OC" (12570616) coils. The set includes eight coils, one per cylinder on a V8, and Speed Engineering states the coils have been proven at over 1000 rwhp.
⚠️ Important Notes:
- The coil harness is designed for LS applications only and not for the factory LT harness
Features:
- Direct Replacement for D51OC (12570616)
- Set of 8 Coils
- Proven Over 1000 RWHP: Per Speed Engineering
FAQ
What coil does this replace?
These coils are a direct replacement for the GM "D51OC" (12570616) ignition coil.
How many coils are included?
The set includes eight ignition coils.
How much power are these coils proven to support?
Speed Engineering states these coils have been proven at over 1000 rear-wheel horsepower.
Do these coils work with the factory LT coil harness?
Speed Engineering notes that the coil harness is designed only for LS applications and not for the factory LT harness.

