Fass Fuel Systems Dura-Max Flow Enhancer GM Duramax 6.6L 2011-2012
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GM Duramax 6.6L diesels do not come stock with a factory lift pump, this means that the stock injection system has to perform the duty of both the lift pump and the injection pump reducing down on the efficiency and performance output for the engine. By adding a lift pump to help push fuel to the injection system drivers will see a large improvement in horsepower and extended life on the injection pump.
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