Aeroflow Coil Extension Harnesses (AF49-1510)GM LS COIL EXTENSION LS1 46" (1170mm) Suit GM LS Series Coils Part Number: AF49 1510 The Aeroflow Performance LScoil extension harness is designed to extend from your GM LS OEM harness to your coilharness when you are relocating coil packs from thefactory location to a custom location of your choosing. This extension comes in both a18" (460mm) or 46" (1170mm) to allow the user to custom mount onto the firewallor engine bay on custom applications. Sold