9005xs HID Conversion Kits are compatible with 9005 HID Kits. 9005 Halogen bulbs have a 90 degree angled base while 9005xs Halogen bulbs have a straight base. HID Kit bulbs do not have bases like normal halogen bulbs do therefore when it comes to HID Kits there is no difference between a 9005 HID Kit and a 9005xs HID Kit. A pair of premium ballast and HID Bulbs along with everything necessary for your installation is included with you purchase. 

9005xs HID Conversion Kits Installation Manuals:

9005xs HID Conversion Kit

9005xs HID Conversion Kit (With Relay) 

9005xs HID Conversion Kit (With Cancellers)

9005xs HID Conversion Kit (With Relay + Canceller Combo)