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  1. 01-04.5 LB7 Duramax Powertrain
    Hello everybody, Been trying to diagnose whats up with my lb7, truck is a bone stock 02’ chevy 2500HD it has 250,000kms with the stock exhaust no muffler. Truck screams at full throttle but feels like its going nowhere. My buddy has two lb7s and both feel way quicker. Ive replaced the...
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