From what i have heard it adds like 5 whp and some wtrqu. And supositly makes the supercharger louder. So let let us know if it does.werdtourmoma said:i just picked up the drop in filter and i was wondering if any has it already and noticed any minor improvements in performance. I had a drop in filter in a p.o.s. hyundai that i used to have but it made it sound much more throaty...does anyone know if this filter would do the same to my ss?