although as i've now said in several of your threads, it replaces the standard fuel pressure regualtor which is on the right hand side of the fuel rail when looking in the engine bay on the 1.6
besides the instuctions are very self explanatory, so unless you've bought a second hand one with no instructions you should have no trouble. if the instuctions make no sense i suggest you dont play with it, as fitting is easy compared to setup.