removed them mate, the ones that we have will probably fail again! Just put the blanks in. no difference in power/driving whatso ever. I did have #3 swirl flap missing and after i did the turbo put everything back together and drove around for a couple of days but always had that niggling feeling that the others could fail and fk the new turbo i just put in, finally my blanks arrived yesterday and stuck em in today, gave it a bit of beans today and checked it out properly, drives good!