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Some of the owners do the 'air box mod' which involves cutting/modifying the resonators and restrictions in the lower part of the air intake system. That and a drop in K&N filter is what seems to be the choice mod for very budget tuners.
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2005 Cobalt LS: K&N intake w/ GMPP Pre-filter, LE5 intake manifold, LSJ exh manifold, LSJ downpipe, GMPP sport exhaust, Eibach Pro-Kit springs, Kosei K-1 wheels, DC Sports strut bar, Corbeau bucket seats, tinted windows, short antenna, partial rear debadge, 2006-present GM fender badges, stainless steel suicide knob, PIAA bulbs
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