i'm selling because i went w/ a spearco instead. the mounting locations line up with that of a oem sti tmic. the only thing needed is a wrx y-pipe because the inlets are slightly offset. this tmic was for a 02-04+wrx. i'm just lazy and didn't want to go buy a wrx pipe. i also like the solid sti pipe. what you could do is get a wrx pipe and replace the middle plastic portion w/ a aftermarket silicone y-pipe. i'm selling for $500 shipped.