Porsche 914 PAIR OF MUFFLER GASKETS 1973-1974 2.0 I love 914. However, the area between muffler and the heat exchanger is the most weakest spot in this car. This area is always getting lose. This is where most 914 leak exhaust. Tip: When replacing this gasket, do not forget to clean all the rust and black carbon from two flanges. Do not reuse old bolts. Torc bolts few turns at a time by moving clockwise. That way the gasket will be compressed evenly.