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i bought an Air Raid intake system and throttle body spacer. it cost just over $300, and it feels like i have a new Jeep. it was very easy to install, took me less than an hour. i have 33 inch tires, and my 4.0 had a hard time keeping up in fifth gear before the install. now my power is better throughout the rpms. generally, any time you decrease the airflows resistance from intake to exhaust, horsepower, gas mileage, and throttle response is increased.

2008-06-10 23:31:58
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