Get rid of your old spoiler, headlights, taillights, and exhaust tips. I suggest a bigger and more aggressive spoiler like SLP's, Halogen headlights similar to these http://www.pfyc.com/cotm/gp/wk399_jthiel.jpg, and some nice dual exhaust tips. If you're going low with some sweet rims like that you have to pull everything together so it looks real mean, low, and clean. Space those rear wheels by 10mm and give it a nice wash and wax. Taillights are up to you, I recommend the ones I just got for my GT.
After you get everyting sorted out, and find a good photographer, you'll make Pontiac history dude!
It's hard to find good quality photos for reference, so I'll give you one of mine. Spyder Auto Smokes!
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