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Performance Upgrade?

You will not see anything from those things. You need to unlock the PCM and do an actual tune to see any real gains. If your just looking to spruce up and make it peppier, banks big horn, Boost tubes and throttle monster. this will give you a lot of throttle response but no real gain.
 
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Thanks. I didn't buy my truck for the mileage and it has plenty of power towing the 35' fifth wheel.
 
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