What is the differance?..i did a search and found some info but iti didnt answer my Q's. I want to build another engine for my R Im a collage student so it isnt like I go money but i do only have one car so i have to keep the original engine in tact for smog...Damn CA!!!! anyway, what i do have on my side is time, so i wanted to start with getting a head built to put on a bored gsr bottem end with a type R crank...anyways i want to run 12:1 compression and i need to know whats the differance between the heads?...is it just that the ITR head is milled a bit and P&P?...any insight would help...thanks

 

better cams
slight p&p
dual intake/exhaust valvesprings
lighter valves
larger intake manifold plentum
bigger throttle body
anything else?

 

b16 and itr head castings are the same....honda just cleans up the itr head with slight P&P......