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 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 coil 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. 2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!