Yoshimura Exhaust Locking Nuts (8mm, Sold in Pairs) Gy6 big bore and Grom

Tired double nutting your exhaust nuts. These nuts are from Yoshimura and have special steel locking teeth to help with vibration. Stainless steel 8mm sold in pair. These nuts are essential. The smaller, 10mm diameter head allows for extra clearance between your wrench and the pipe for easy access.

These also work on the Honda Grom

Standard is 8mm thread diameter.