Coil Extension Harnesses AF49-1510Coil Extension Harnesses46" (1170mm) Suit GM LS Series Coils AF49 1510 49 1510 The Aeroflow Performance LS coil extension harness is designed to extend from your GM LS OEM harness to your coil harness when you are relocating coil packs from the factory location to a custom location of your choosing. This extension comes in both a 18" (460mm) or 46" (1170mm) to allow the user to custom mount onto the firewall or engine bay on custom applications. Sold