Stian, The exhaust headers are made of cast iron, they are very thick so rust is not a concern. The stainless components, like the muffler, will brown from heat not rust. The only exhaust component that I have had to replace on my 260K De Lorean is the pipe clamps. "Happy New Year" DMC Joe / De Lorean Services / <dmcjoe@xxxx> Web Site: <http://www.deloreanservices.com> ----- Original Message ----- From: Stian Birkeland <dmc_norway@xxxx> To: <dmcnews@xxxxxxxxxxx> Sent: Monday, January 03, 2000 3:13 PM Subject: [DML] Color on exhaust manifolds/catalytic converter > > Hello all, > Are the exhaust manifolds and catalytic converter suppose to have a brownish > color? To me they all look rusted, so who can tell - are the exhaust > manifolds/catalytic converter made of stainless steel or ordinary steel? Are > they prone to rust, or is it just the heat from the engine that has caused > the brownish color? DMC JOE? > > Thanks! > Stian Birkeland > NORWAY