I have a 2000 chevy tahoe limited, and i wan the engine to be a lil more powerful but easy on fuel. I have been reading up on programmers and superchargers, 1st do programmers overwork a stock motor and tramnsmission? Are superchargers hard on valves and pistons since they make the motor work twice as hard? Any one know about these products?

kn airfilter headers free flowing exhaust system power programer this combination should give you the performance you are looking for.anything after this to increase hp cost lots of money.the programers dont work engines any harder.superchargers it will depend on how much boost is set your pumping more air through engine than engineers designed it for.