I'm builiding my homemade CAI today. Trying to figure out how I'm going to make a PCV nipple. Easiest way would be simply threading a fitting in my hard pipe. Would probably disrupt the airflow a little from the thread sticking out in the pipe. I guess the best way would be tig on a small pipe, problem is I don't have a welder in my garage. Any suggestions... Could I vent the PCV with one of those PCV conical filter or would that not be good for the motor. I know putting a vacuum on the crankcase helps ring seal.