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  1. Header and Exhaust Upgrade for 2008 Cobalt Ls 2.2l

    Engine Mods
    I own a 2008 cobalt ls and I'm looking to buy Item #: ZZ-MIDLHDP which is a mid range header with 1.50 primaries and down pipes at 2.50 inches and I was wondering what exhaust I can use with it that's cheap but worth it. I find alot but most of these sites don't give me diameters of the piping...