Don't recall if this has been posted. I was searching the Dinan site hoping that the chip remap was released. No such luck, but I noticed that the free flow exhaust is now available for for the 550i. I have the Dinan exhaust on my 545i and have been very pleased with it so far.

 

Yes i noticed too but at $1,399 i rather go and get a dual from eissman i think the quality is better. But since i dont watn to spend that kind of money... i wish dinan make a thanksgiving or christmas sale event of 50% discount on everything as they did not too long ago before the 550 exhaust was availlable ..then i will definately consider it