I haven't done anything yet...it has a fiber rear apron cover from aircooled.net (good quality-good guy), but no muffler slots, so I guess the header stays...and now I can't lock the engine cover...instead of whining I should look at all this stuff - but HEYI'm 51 with a 28 y.o. wife :+) >>>and it is getting cold again today...only 70F in Atlanta this afternoon uhuhhUHUHHyuckyippee