Standard Motor Products F50001 Ignition Coil Wiring Harness Repair Kit All TechSmart HEI harness repair kits are guaranteed to meet or exceed OE performance providing today's technician with the quality parts needed to get the job done right, the first time F50001 includes a new tachometer and power lead to replace worn or damaged pigtails and restore proper tachometer function on vehicles with HEI distributors