I see a lot on the US BMW forums that a popular mod is the ebay performance header (or exhaust manifold to us brits) - see link: STAINLESS STEEL T304 RACING MANIFOLD HEADER/EXHAUST BMW E46 E39 Z4 V6 2.5L 3.0L | eBay
1. anyone know if they are any good?
2. anyone tried to fit them on a rhd? steering column may foul???
3. is there a european dealer as $154 delivery is a little pricey (although not too bad considering the distance!)