07 Trail Blazer
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Joined: Sep 2015
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07 Trail Blazer
Just bought my first TB . The 4.2 6 is about the only GM motor I never owned. Looking for ways to maybe improve gas mileage and horsepower. I'm sure I can get a intake and filter. Was wondering if anyone changed out chips , muffler or can tell me something of importance about this motor. Thanks
Last edited by Neck; Oct 3, 2015 at 9:24 AM.
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