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The supercross version is designed for more low to mid-range power where the moto version is focused in the mid to upper RPM range
Constructed from aircraft grade aluminum and high strength stainless steel
Meet the WORLDS bestselling spark arrested exhaust
track and trail proven unrestricted power and performance
-Use with FMF or Stock OEM Header
Q4 HEX S/A 044452 KTM-450 EXC-2011 The supercross version is designedFMF is the leader in 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 dont need to hear the power, just feel the power! Less sound equals more ground Meets USFS and FIM World Enduro sound regulations Power gains throughout the entire rpm range Spark
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