I joined SpoolStreet to see what MHD customization info I could find for my 2012 535i w/mechanical wastegate and manual transmission. Not sure how many manual transmission 5 series owners there are any more. Seems like there are plenty of happy 1, 2, and 3 series manual transmission owners. I'm going to see how long I can keep my unicorn happy with some minor mods (probably MHD Stage 1 and maybe some entertainment system upgrades). Don't really want a race car, but 40 to 50 more hp would be welcomed!