Just got my 08 Mustang about 4 weeks ago and as of now its completely stock. My first mod, if everything goes to plan, will be the FRPP dual exhaust kit. If anyone has any other suggestions on mods let me know. Its an automatic by the way. Pic was taken with phone.

 

Welcome to MF! I'd suggest looking for threads about CAI intakes and tunes. Combo packages are available from reputable tuners like Brenspeed, VMP, Bama, Evolution, and Alternative Auto. A GT take-off muffler(s) or aftermarket muffler(s) is also a good idea.

 

Your first mod should be to take the side stripes off imo. It's free and made my stang look 10x better. +1 to what 28hopup said too.

 

^^^def agree with the side stripe removal, its easy and one of the best mods you can do!

 

Agreed on side-stripe removal.
Is that a dealership badgevertisement on the back? If so, I'd see about removing that as well.
New muffler (single Flowmaster AT) was my first mod - get a little sound out of the thing.
Next I did shorter antenna (14"), sequential tail lights, and billet upper grille.
Then window tinting, and have 1/4 window louvers, and new rims, en route.
All of these cosmetic so far.
CAI and tune: agree with 28HopUp, as the easiest and least expensive 1st mild performance mod.
Was reading about rear anti-sway bars today - hadn't even considered handling mods until reading that - dang - now that's on my list, too...

 

I like the flowmasters also......And apparently Im the only one on here that likes the rocker stripes.

 

yeah thats a dearlership sticker... havent gotten around to take it off. In no particular order im thinking of getting sequential tailights, rims and tires, grille (maybe GT style or the old shelby look), exhaust (FRPP duals), and CAI (not sure if I feel like spending an extra $300 for a CAI/tuner combo-package). I think id rather wait and see what the car would end up looking like before I take of the rocker stripes