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JLT's 127mm Big Air induction system (PN CAIP-GT500-10; $349) is a proven performer on the prior GT500s and on aftermarket supercharged Coyotes. It was a natural first step in the transformation of the '13 GT500. The kit features a massive inlet tube, a 5x9-inch conical filter, and a heat shield that accepts the factory fresh-air ducting. The filter even includes a screen to straighten out the airflow for the mass air meter, just like the factory inlet. This simplifies tuning the combination.