Holley 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 a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold.
|Harness Type||MAP Sensor Adapter|
|Application||Adapts LS3-style MAP sensor to work on Holley LS1 or LS2 Main Harness|
|Unit of Sale||Each|