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Hey guys, new to the forum. I did a little browsing and im sorry for any repeat question. My civic has the non vtec d15b7. I was wondering what other D series parts i can bolt on for a performance increase. ie Intake manifold or Exhaust Manifold? Also, what parts will i need to acquire to make it vtec. This is my first project car, but im handy with a wrench. I bought it for 600 bucks, and replaced the rack and pin on it. Its been a champ since. Any info on upgrades with out doing a swap would be much appreciated. Just wanna get the most out of the D15. I thought about a swap, but im a poor man.