I could have swore I saw someone doing this but im not 100% sure

Input on if it works and if it does if there are any decent power gains?

Im running a JDM B16a btw

 

yes it should work but u have to get the right ones

 

Which ones are the right ones?

Gotta get JDM ones since im running a JDM motor?

What kinda power gains am i looking at?

 

Which B18? Are you talking about a C1 or C5? With C1 (gsr) gams you will not notice any power difference. With C5 (ITR) cams you will gain some power and you will benefit more power-wise if you upgrade the valvetrain as well, although it's not necessary to run the cams if you don't rev past the stock redline. And this is all assuming that you will have the car tuned.

And no, you don't need to have the JDM cams. USDM cams will work also. Keep in mind that B16b (ctr) cams will also work and will net you some power as well.