We now have in stock the Cobalt/Ion and Cobalt SS/ Redline Ion K&N drop in filters ! Gain a few hp with the rewashable/reusable filter from K&N for very little money !

$37.00 plus fedex shipping for non supercharged Cobalts/Redlines
http://www.modernperformance.com/gm/kn_colbalt_ion_filter.jpg

$54.99 plus fedex shipping for supercharged Cobalts/Redlines
http://www.modernperformance.com/gm/kn_colbaltss_ionredline_fil.jpg

Nice did you guys do any mods to the airbox to help let the car breath? Or just dropin air intake.

So far, all we did was just put the filter in the air box and gained a consistent 2-3 hp across the board !

I wouldnt do any modifications to the air box (ie, cutting it, removing lids, etc) as it wouldnt really cause much of a gain over stock, or stock w k&n. Also anything else you might do might let more dirt, debris in the air filter box and you dont want that in the first place.