Save your money and don't touch what you have now...all the bolt ons on that motor will give you like 10whp...don't waste your time!

b16 tranny is the ONLY way to go with N/A b20...I have that tranny on my boosted b20 and I am still happy as f*ck!!!. gsr trannys are nice too but I would stick with the b16. My b20 threw down 150whp with light mods. If you need to know more about getting the b20 into the car with the right bolt ons PM me and I will list everything I have and everything I planned on doing in order to reach my goal of 160whp and 140wtq with just bolt ons. It's my gsr killer setup