Tapping PCV hole on MP Perf. Valve Covers..

I don't know this for fact but I always guessed it was cheaper for the factory to just run a pipe to the air cleaner and use it for a combination air cleaner/valve cover breather than it is to install a separate breather. Pipe probably cost about .50 and a breather probably cost about .75-1.00 factory prices. Considering all the cars they sold .25-.50 saving per car ads up to allot over the yrs.