What kind of mods for the 2008 R32 would be the best bang for the buck?

i just put on a mid pipe res. delete and i love the thing.. also an sport air filter will do a lil bit to u and it is fairley cheap. but back to the pipe. it is loud as hell but deff not a fart cannon off a honda civic that u might have seen b4. it is the same sound off the r32 but louder and more air flow and put me back only $120.00 and cost te same to put in depending on the place u go to. but I hope this helped u out.