Holley EFI LS Main Harness to LS3-style MAP Sensor Adapter

Holley EFI
Sale price


Regular price $39.80
Holley EFI LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses an LS1/2 MAP sensor connection to an LS3 MAP. Also great for use with LS Hi-Ram intakes that require an LS3 MAP sensor.


  • Allows for plug and play ignition timing control when utilizing an MSD Pro-Billet distributor.