Features: 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. Specification: Item Type: Ignition Coil Relocation Harness Kit_x000D_ Material: ABS_x000D_ OE: 2558948, D580_x000D_ Application: Ignition coil extension wire harness set, used in the repair and replacement of the original vehicle_x000D_ Fitment: Fit for LS1 and LS6 LSX coil_x000D_ This 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 Note: 1. Please double check the part number of your item, matching information is for reference only._x000D_ 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!