Yes, it does add a bit of restriction to the air intake. This is one reasons why I removed my whole assembly and put a generic intake hose from the filter box to the elbow by the pontoon. There isn't too much noticeable difference, but I could feel a slight boost at high rpms in higher gears. The other reason I removed this off of my car was because mine was rusting, and fileing a hole into the aluminum cooling line which it rubs. Anyone with this still in place really should check that alumimum pipe for wear. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960 --- In dmcnews@xxxx, Roland Barmettler <roli@xxxx> wrote: > But isn't this whole air intake system with all its bends, hoses and > that valve posing quite some air flow restriction and therefore some > performance loss ? > > Greetings, > Roland > Roland Barmettler - roli@xxxx - http://www.DeLorean.ch - VIN #11512