great write up and its nice to see some actual intelligence instead of "hey what'd you put on your car, that would look sweet on my car". This is the first time I've heard someone mention "flowing heads" or vvti cam change out issues. I am a fan of N/A, mainly because i come from the motorcycle industry, but also because i live in CA and need my car to pass emissions tests. And no, I'm not going to do a full turbo kit then try to change it all out in a weekend just to pass my smog check up on monday, then put it all back. Ive seen several people over the years that try it and it never works out. If your married at least.... again, great info here i love this crap.