E39 M5 and E52 Z8 Discussion
BMW e39 M5 headers / 5 Series RDsport headers: eBay Motors (item 230480541789 end time Jun-03-10 15:45:53 PDT)
Found these on ebay, they look pretty much stock but it says in the description that they use bigger tubing, they also say they were originally designed for the 3 series v8 tornado...