Any quality catback exhaust will bolt up no problem. With intakes you are a little more restricted as the good cold air systems require either minor cutting to get it to fit (Stillen G3) or relocating the washer fluid reservoir (Injen).
I have a Fast Intentions catback and K&N drop-in filters. Very happy with them.
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F.I. / K&N / 180 / Forgestar 
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