Holley 558-312 Smart Coil Ignition Harness

HP & Dominator Smart Coil ignition sub-harness

Includes a pair of coil harnesses for an 8 cylinder engine. These harnesses are similar in design to factory GM LSx coil harnesses but plug into Holley IGN-1A style Smart Coils. They plug into Holley LSx plug and play main harnesses if one wants to replace factory LSx coils with Holley Smart Coils. If using a non-LSx main harness, purchase PN 558-307 for connectors, wiring, terminals to connect directly to a Holley HP or Dominator ECU

Includes a pair of coil harnesses for an 8 cylinder engine

Helpful Links

• For use with Holley HP or Dominator ECUs
• Holley Smart Coils
• Smart coil brackets for stock LS valve covers
• Smart coil brackets for LSA/LS9 valve covers
• Smart coil brackets for Holley LS valve covers
• Smart coil brackets for stock LT valve covers
• Instructions