So I just installed a 8000K kit that I got from our site's vendor for my 07 A4. As soon as I turned them on theyBOTH just started flickering. It would be great if I was in a nightclub... but not exactly what i'm looking for driving down the road.

I followed everyone's advice and hooked them up without the relay harness, used the resistor... everything. Checked my wiring... twice

Think of anything I could have missed or hooked up incorrectly?

 

Where did you mount the balasts? They can't get hot or it will cause them to fail prematurely, and usually flicker when they go bad.