Hi everyone so my 2007 997s comes with stock xenon's. I decided to change the ballistic and bulb to an aftermarket one. I have the proper bulb and proper fitting but when i install them into the head light the clamps that hold on to them dont grab entirely. Which case the bulb is extremely loose in the headlight. Can someone assist me and guide me on this?? Been having some issues all day with it.

 

I understand changing the HID bulbs to get the different Kelvin bulbs for more color option. But why go with aftermarket ballast? There are plenty of sources for OEM ballast. You are just asking for fitting issues going aftermarket as there are no standard for form factor for ballast.