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  1. BMW Tuning Forum
    Hi. Does anyone know if the oem exhaust manifolds on an e36 m3 evo are mild steel or stainless? Need to do some welding on one which has not arrived yet. Also what about the rest of the exhaust. Thanks
  2. BMW Tuning Forum
    Hi all, i have noticed for some time now on fleebay stainless steel manifolds to suit my m50 325 lump, they're constructed of 304 stainless (a fairly average grade in architectural terms, not sure about automotive?), but otherwise don't seem bad, mandrel bent tubing, CNC machined flanges etc...
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