very easy very simple just look at it and use the logic and the only instruction mine came with was a paper saying DONT CUT THE BLACK CABLE OFF lol. only thing u have to do is fix the cable no harness. try it and u will see how easy it is, only bad thing about this, is the ring n the angel eyes after 1 month they just stop working lol thats why u get like 1 month warranty on the ring. but i have to say once install it looks sick espcially at night time and oh yeah is better if u get some better bulbs cause it comes with cheap ones, get some xenon 100watt H1 , a beauty looking blue. is it a integra or mercedez?BMW? looks good