Q4 Hex S/A Slip-On MufflerQ4 HEX MUFFLER High performance quiet technology and our Q4 HEX is the next evolution in off road exhaust.The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available.With the Q4 you don’t need to hear the power, just feel the power!FeaturesLess sound equals more groundMeets USFS and FIM World Enduro sound regulationsPower gains throughout the entire rpm rangeSpark arrestor includedPounds lighter than stockRugged design for off-road enduranceFOR CLOSED COURSE COMPETITION USE ONLLY. NOT INTENDED FOR STREET USE.