Technical Articles

The 912E exhaust system

The exhaust system is one that is unique to the 912E. Thermal reactors were required in California to meet the strict smog regulations there. Usually you will find that these have been removed and replaced with bypass tubes. Apparently the build up of heat shortened engine life.

Stock mufflers are NLA, as are the heat exchangers, but NOS and used units pop up now and again in online classifieds and auction sites. Stebro makes a really nice looking stainless steel reproduction, but there have been some issues with the fitment.

912E Exhaust System

Most owners buy a Bursch muffler, because nothing else is available. Although occasionally somebody finds OEM mufflers... but they are rare, and expensive. If you can find one...

You can buy headers from Performance Products for about $250 new or look around for some used ones. The stock muffler is no longer available but you can buy a Bursch setup for under $400. If your gaskets are still good after disassembly hold on to them—they are NLA also. Copper exhaust gaskets are available at the Type IV Store.

Most buy BURSCH muffler, because nothing else is available. Altough occasionally somebody finds OEM mufflers... but they are rare, and expensive. If you can find one...