Exhaust in the car...300TD

[dezul313]

While driving my wagon with the windows down, the car has exhaust coming in from somewhere. If the windows are up, no exhaust. The car was hit in left rear and fixed. The exhaust pipe off the muffler has been pinched a little and that pinch put a small crack in the bottom of tailpipe. I don't see how exhaust would swirl back from that far back. Could that be the source?

Also, in the past I came across a web site from a young kid that sold an entire exhaust system from the maifold back for the 123 chassis. Does anyone know what site I'm talking about? Thanks...