Stock boosted K's have seen the 400's easily now a days, and some even in the 5's. If you want info on Boosting K's you need to stop looking at this site and go to K20a.org. They will be a lot more help to you over there, not taking anything away from people like Spoolin on here... just saying.
And to Spoolin, i think it's interesting to note that you say B series motors have been in the 1000's for years and that you just recently saw a K in the 1000's. Now I don't know much about when and where the first 1000 HP motor happened, but I just wanted to point out the fact that your statement is a loaded statement because the B series have had SEVERAL more years of R&D as far as racing and building goes, and that as with all things developement, it takes time to bring out the best in everything. So with that I just want to say that it wont be long before the fastest boosted swapped cars will have K's
