[soundspeed]

I just put a B16 in my civic and I want to put in some Type-R cams. My question is which ones. CTR, JDM ITR, or USDM ITR? Is there much difference between the three? Also I would be able to get the USDM ones the cheapest through a friend that could get them for me at cost since he works for Honda. Also, would I need to change the valve springs and retainers as well. Any input/advice would be greatly appreciated. If it helps I plan on keeping the motor N/A. Thanks guys