I've read elsewhere that the actual headlight dimmer switch itself can be the cause of a lot of flickering issues. On my car I have to turn my dimmer dial back like 1/16" to get max brightness without flickering. If I turn it the entire way to full brightness my gauges flicker like crazy.
2003 ZX5 SVT #1345
CD Silver; Red Interior; Audiophile; Moonroof; HID's