I put an exhaust flange in with old nuts in my 240, which worked themselves loose and dropped the header pipe off completely on a long overnight drive. I tied the header pipe on with wire and drove another few hundred kms in my now very noisy car.

I remember it sounded fantastic on the overrun, like a cannon as the unburnt fuel blew off. When you bolt the flange back together you'll think something's wrong with your engine.

You won't do anything serious to it, enjoy the ride.
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Drive it like you hate it