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the easiest and cheapest way is to drop the size of the supercharger pulley. but remember you have to do "supporting mods" so that you dont hurt your engine due to increased boost. Examples are exhaust mods, CAI, tune, colder plugs, lower thermostat, etc. The stock size is 3.8. you could go to a 3.6 without any mods. will give you aprox. 2 more lbs. of boost and 10-20 hp. any size smaller than that you will have to have supporting mods.

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