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  1. LLY / LBZ Mouthpiece Flow Data

    04.5-05 LLY Duramax Powertrain
    Hi everyone, I thought you might be interested in some flowbench data for the LBZ mouthpiece modification for the LLY engine. I was bored yesterday so I ran a few bits across my flowbench. This modification is the best thing you can do for an LLY! There is no point in buying a CAI with the...
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