I am curious about the little do dongles inside the m60 intake manifold. While doing my intake gaskets, pcv plate, and throttle body gasket i noticed there are 8 square with a rounded bottom inserts into the intake passages. i took all of them out after i screwed up and knocked one loose. decided it was a waste of time to try and get it back in (after 20 min of screwing with them) i have a couple spare intake manifolds in my parts collection. i decided to take a couple pcv plates off and do some research. 4 of 6 had them completely taken out and 3 of 6 had the top styrofoam plate removed. these intakes are from a variety of m60 3.0 and 4.0 liter m60's of various maintenance. i noticed a significant difference in the way the car drove after the maintenance and "mod". what drawbacks can be expected from removing these intake directors. are they simply a way of limiting power?