1、Application: This ignition coil wire harness kit can work with LS1 and LS6 coils. Can also be used with other coils with 65mm spacing. 2、OE Number: Manufacturer part numbers for reference are 2558948, D580. Please make sure the OE number matches the part you are replacing. 3、Package Contens: This ignition coil relocation harness kit includes 2pcs repositioning bracket harnesses, and 2pcs coil extension harnesses. 4、Mounting: You can mount the coil set anywhere you want, these brackets can be mounted on frame rails, firewalls, under the headers on each side, etc. 5、Good Replacement: Professional manufacturing, high performance, high temperature resistant, ideal replacement for the old or broken one. Item Type: Ignition Coil Relocation Harness Kit Material: ABS OE: 2558948, D580 Application: Ignition coil extension wire harness set, used in the repair and replacement of the original vehicle Fitment: Fit for LS1 and LS6 LSX coilThis kit will also work on any LS wire harness as long as you use the coils listed above. For example if you have a LQ4 harness it will work as long as you use LS1 Coils.They will not fit LS2, LS7, or Truck Coils 2 x Ignition Coil Relocation Harness 2 x Extension Harness