I have JDM B18C engine, and now I kinda want to put NOS, which system is safer?
Dry system or Wet system?
Is that right that the fogger in the Wet system are drill in the intake manifold? and the Dry system it drill in the intake?
Thanks...

 

Well to answer your second question, no. You don't have to drill your IM for wet kits. Thats for direct port. But the first question about which is safer is personal opinion. Mine is wet is safer over a 50-60 shot.

 

So, is direct port is safe? or dangerous?

 

direct port just makes higher shots safer. Because of even n2o distribution.