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  1. Duramax Second Generation: 2004.5-2005 (LLY)
    Got around to the install of a set of profab manifolds, up pies, downpipe, 3" bridge, and the 3" cold side tube and deleted the egr, the bridge is a bit of an install but can be done with the turbo in place but it was a little tedious. but worth it from what I can see so far. the exhaust sound...
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