No modifications are required -- these kits simply bolt into the OE hangers and brackets. The new Mopar Performance SRT-4 Cat-Back Exhaust System is a mandrel bent, 2.5-inch diameter T304 stainless steel system, compared to the production 2.25-inch, providing reduced back pressure and a deeper exhaust note. The dual outlet tips are a full 4-inch outside diameter of highly polished stainless steel, giving a no-nonsense appearance from the rear of the vehicle.
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