is it worth getting the power steering pulley and the water pump pulley from Unorthodox Racing?will it increase the HP?What is dyno tuning and how do you do it?do you need to tune it after every mod or only some?What is underdrive?Thanks for the good thread!

Ok, so I came across this site about 3 days ago and I just bought my '05 Vibe, AWD, A/T in January. Ive been though tons of posts to this site, reading and learning. Took me long enough to figure out what 1ZZ and 2ZZ was. 1ZZ = VVT-i motor.... right? (but whats the VVT-i mean?)Thats what I have anyw...