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The trouble with all these tuners is that while they give you the capability to change the tuning, they still need to be programmed for your vehicle (the "tune") and this is usually sold seperately. Usually, these generic tuners just advance the timing when the engine is at WOT. That's the only place you get the power increase. And you're not going to be able to feel the ten lousy HP they claim you get.
Some years ago, you used to be able to purchase a tune tailored to your specific vehicle/transmission (I got one), but I don't know of anyone who provides that service now.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.