My advice would be to buy a decent boost gauge and run a decent ebc, gather all your parts together and drive it straight to a mapper. I wanted my k1 to 1 bar but the little beasts can take up to 1.3 bar according to toyotagtturbo source. I made just shy of 220 at the fly but it's the torque that speaks. The torque from the k1 is just like td04 I made 200lbs which is pretty crazy for how small it is just top end that lets it down but our gearbox'sare not built for top end ratio anyways. It's a corner turbo that will keep up ;) I plan on maxing it on a forge engine just because nobody else has or what I have seen or heard. Anyways a read Dave Ashton had a k1 a long time ago and had problems getting his right running plug n play. It's all in the map the map is the key I'd only run it at 1 bar though you won't need a fpr. I just use the stock works fine. The emb and emu as far as figures go they are just the same the emu removes speed cut but so does a gearbox convertor. I personally wouldn't run a plug n play I lost sleep for a week making this decision. They do their job but for the price getting it mapped is the better option. Good luck.