Alright, I have a 2.4 L SS and the rear bumper is similar to the SC/SS but the grille at the bottom is a single strip instead of a split grille. I've seen some Cobalts that have dual exhaust and the grille I see is made to fit a dual exhaust. Are these grilles aftermarket or are they just modified?

Also, in the front, the grille that has the chevy logo on it has to go! This is the only car i've ever seen that has the plastic radiator cover a part of the grille. I need some help removing this grille. What is the best way?

 

You should be able to find a how to on front grille removal, try a search. The deal is the actual slats come out but the bar, with the logo, are part of the bumper... you'd either have to customize it or buy an aftermarket bumper that doesn't have this center slat.

On the rear - the kits I see most often with the dual exhaust are the Razzi kits.