Armytrix Stainless Steel Valvetronic Cat Back Exhaust System (Long Wheelbase Model only)Enhance your 971 Panamera by adding the ARMYTRIX Stainless Steel Exhaust System. This system will increase power, reduce weight, and improve sound. This precision made performance system delivers more power, especially in the low and mid rev range, the effect on the sound is significant, adding a deep resonant sporty sound, but at the same time neutralizes the annoying frequencies in the most critical rpm range. ARMYTRIX exhaust systems differ from