Copper exhaust lock nuts are the correct solution when installing exhaust components. The softer metal of the copper deforms onto the steel exhaust bolts to provide a vibration free fastener.  These M8 copper nuts are also found in our complete exhaust hardware kit.

Fitment notes:

• It is best not to use these on the studs directly attached to the cylinder heads as they have more likelihood of pulling the studs out with them if you ever need to loosen them.
• Please use flat washers with these copper washers rather than the wavy washers used with steel nuts..

These are copper exhaust locknuts that will not vibrate loose. Use these on all attachments that are through bolts on the exhaust system.  They are great for all through bolts for the rest of the exhaust system. 

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