this is probaly a stupid question but i have a set of h4 HID kit and i was wondering if there is anyway i can modify the bulb so it would fit my 2001 a4 which is an H7 ??

 

very unlikely. you have to be extreemly careful with HID bulbs and if it were off just alittle the light output would suffer greatly. just look for new bulbs. Call the place that manufacures your brand of HID kit and tell them what you need. they may work out a deal with you.