This Gibson Dual Exhaust Kit is the perfect addition to your Polaris! This exhaust adds 3-5 more lbs of torque and 2-3mph. USFS Approved Spark Arrestor, no packing to replace, better performance, better looks, the choice is obvious! This Gibson Dual Exhaust Kit is a direct fit replacement and includes all hardware for a hassle free bolt on installation on your 2015 Polaris RZR 900S. It has dual 4" Tips and 2.25" diameter piping. The part number is 98024.