Not rocket science, NOS on the audi... Seen several on vw's, tried it on my glhturbo a while back and the options NOS has now for not only the injection, but the controls, is an awsome matrix..... I would consider NOS for a stock tq motor, but once you start the tweeks, heat and impending knock start you towards that mushroom statistic NOS has the ability to do to yer engine........... Scott