Congrats!!!....I have a gt but i love to keep it clean....as for the engine i use purple power and then pressure wash it off and top it off with cd2 engine detailer it really makes the the plastics shine and really impresses my friends. For the outside i like to Turtle Wax Carnauba Paste Wax it takes some time but always looks great and for the inside tuffstuff works great if u find any stains and use armor all to shine up the dash. idk much about v6s but i would think a intake and tuner would have good benefits...idk much about exhaust either but I would recommed getting rid of the v6 bumper and getting one form a gt or gt500 if u go dual but they can be pricey... but anyway best off luck with it!