The GKTECH axle spacers are CNC machined from billet aluminium and are concentric in design to ensure the perfect fit. Our V2 version goes between the driveshafts and the hubs and eliminates the need for longer bolts which under high loads can strip out. We now have the option of a spacer as thin as 5mm which is perfect for lowered cars however when running extended LCA's or a dual caliper brake kits the 10mm are typically the choice. Without axle spacers the hub is moved out and as such the CV's become more and more prone to damage. These axle spacers resolve this issue. Vehicle Compatibility: - Nissan Z34 370z - Infiniti G37 Sold as a PAIR. NOTE: Running 10mm or larger spacers will require you to modify the OEM axle nut in order to use the split pin. Alternatively you can run a suitable thread locking compound.