i have a set of ctr pistons and want to kno if it will be safe to install in my b16
i heard that it will tap the valves..
also do i need to do anything special to install them

 

It's safe. Nothing special. Did you measure your bore before you bought your pistons?

 

As long as the pistons aren't oversized, the only thing you need to do is mill 1mm off each end of the rod at the piston end so they will fit on there. This isn't a big deal, any machine shop can do this for you. But people run into clearance problems with B16s when they use Toda Cs or other huge cams. You should be fine. If you're paranoid, you can clay your motor first.