Improve both looks and performance with this Gibson Exhaust System. Enjoy an extra increase of 5-6 rear wheel hp, 4-5 more lbs of torque and 2-3mph top speed. USFS Approved Spark Arrestor, No packing to replace, better performance, the choice is obvious. This Gibson Exhaust Kit is a direct fit replacement and includes all hardware for a hassle free bolt on installation on your 2011-2014 Polaris Ranger RZR XP900 AND XP4 900. The part number is 98013.