Tunable inserts allow for easy sound and power adjustment Improved power and torque Dual outlet and stylized tips Removable spark arrestors Meets J335 forestry standards NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE. NOT LEGAL FOR SALE OR USE NATIONWIDE ON ANY FEDERAL POLLUTION CONTROLLED MOTOR VEHICLE UNDER THE CLEAN AIR ACT. MUFFLER PWR TUNE RACE