This harness is required when installing SLP's Mustang X-Pipe #M31032 on a 2004 GT. It may also be used in any 1996-2003 SOHC application where an O2 extension harness is needed.
* Please note that there is a shipping discount on multiple items in the same order(excludes oversized items). The shipping amount here reflects a 1 item/part purchase. Shipping price reflects shipping within the contential US. All other locations extra.
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