Exhaust Work for 81 Euro 911

[Brian Minkin]

I did the Bursch headers and a Bursh exhaust on a 2.4 litre targa a number of years ago. The positive was that it increased the torque at low and medium RPM.  Car was certainly noisier then stock but not unpleasant. If you have an oxygen sensor on your car then it will have to be tapped into the header as they do not provide a port for the oxygen sensor.

The negative was that it eliminates the heat and defroster.

Bursh makes an exhaust that will bolt right up to the headers.  Dansk also makes an OEM type sport exhaust that will bolt right up. 

Dansk also makes a Pre-Muffler that replaces the cat and will also give a performance boost without going to headers and allows you  to continue to use the stock exhaust or go to a sport exhaust for greater performance.

So you have a number of options. 

If you are concerned about value the Dansk pre-muffler and sport exhaust since they keep the system basically stock are the way to go.

If you go with the headers the manifold bolts you speak of are bolts that go into the heads and mount the heat exchangers.  Although they are very rusty there are some super penitrants made today that may free them up. If you dont want to do this DIY then any of the shops that service AIR Cooled 911's have been through this zillions of times and can get them out.