Arctic cat/Yamaha 998 locking exhaust fasteners

These fasteners use  wedge lock washer that will actually tighten as vibration forces act against it. Unlike other types of locking hardware which only act to keep the bolt from falling out, these will genuinely work to keep tension and clamping forces where you set them, helping to prevent blown out exhaust gaskets.

NOTE: Torque to 27 lb-ft minimum in order to lock