Here's a link to all TD ecu page http://www.tuningdevelopments.co.uk/index.php?cPath=502_520_588 I've got the EMU which came with the car when I bought it. It's a good base for when I go forged and TD04 in the future. It all depends what you want you want from the ecu. Check out the link above and compare the EMB and EMU.