looking to increase horsepower and torque on my 04 2500hd. Any recommendations on a catback system, what are your thoughts on a throttle body spacer. currently have flowmaster muffler and k&n filter

Asked by richh042500hd Mar 23, 2011 at 01:08 AM about the 2004 Chevrolet Silverado 2500HD LS Crew Cab 4WD

Question type: Car Customization

charger kit.  towing 2300fs weekend warrior for recreation use

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