So here's another thread for M45 owners wanting long tube headers. I sent an email to this company
http://www.ppeengineering.com/index.php requesting some headers and this was their response.
"We don't have a design for that application right now. We would need a car here to prototype on. Prototyping normally takes 2 weeks to complete depending on difficulty of the design. We should have availability for a new project in July or August.
Pricing would more than likely be comparable to our Lexus IS-F V8 headers which are $1400.00 for the pair including ceramic coating. It all depends on how difficult it is to make them/how much room there is to run the tubes."
Best Regards,
Paul
If anyone is near Tempe, AZ and would like to be the person to help fab this up let me know otherwise we might need to send them some stock manifolds and cats in order to get this done. From what I heard the initial guinea pig could get a discount. Also keep in mind this price is a rough estimate and maybe if it's too out of the price range we could ask about shorty headers.