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I'm sure that is true based on how poorly the truck stops. All in all this was some improvement in power and the engine seems to breathe easier revs better and more low-end torque.
.But while at that dealer, Ken Klickman took the time to do some research, including phoning some high-level personnel involved in designing the Viper heads and who currently is considered world class on Viper header flow modifications. Amazon is a good place to pick it up and save a couple bucks.