I couldn't resist cutting into the flexi joint to see what has happened, they will be replaced anyway. There was only slight exhaust blackening on the underside of the exterior braid but it had fractured all the way round at the rear end, as Stevo666 said. Both sides will be getting replaced with the iLok type flexi, as my exhaust person says they are the more durable type. This one seems to have an interlocking interior pipe inside a convoluted pipe.

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