Are you tired of dealing with electrical "gremlins" caused by your cut-up, spliced and unreliable under-dash wiring harness? Scott Drake has the solution to your problems with this Premium Under- Dash Wiring Harness with Relays. This Scott Drake exclusive was designed to look like an OE harness but with a modern 12 circuit ATC fuse block and relays for improved performance and reliability. Each harness is tailored to exact specifications with proper molded connectors and correct colored wires for a "plug and play" installation. There's also room for expansion with spare hot and keyed terminals in the fuse block. NOTE: For standard Mustang models without factory tachometer or GT package only.