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These pipes are state of the art, hand crafted out of 304 stainless steel, the head pipes contain a full taper from the port size all the way to the 2.25" silencer core.
Special is available for the Honda 400ex, Yamaha YFZ450, Yamaha Raptor 700 , Yamaha Raptor 660 , Honda TRX450R , Can Am DS650
http://www.kbmotorsportsonline.com/exhaust-/dual-exhaust-/lte-dual-exhaust-.html (http://www.kbmotorsportsonline.com/exhaust-/dual-exhaust-/lte-dual-exhaust-.html)