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  1. 2011 GMC 2500 LML Exhaust Options

    Performance Upgrades
    I recently bought a 2011 GMC 2500 Duramax. I've worked at Lou's Custom Exhaust for the last eight years and I've done a million diesel systems. However, I've never seen anything like the exhaust on my truck because it has the diesel exhaust fluid injector. I'm stumped on where to start, not...
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