Special designed washers, held in place with a special e-clip, installs around the nut and will not allow the nut to rotate. This makes it impossible for the nut to loosen itself, so... guaranteed to never loosen! Kit includes 4 nuts, 4 clips and 4 special washers.
Fits: > Exhaust to head: 84-21 B.T.; 86-21 XL; 08-12(NU)XR1200; 87-10(NU)Buell XB
