Zero Sports world leaguer exhaust
 

I'm thinking of getting the Zero Sport World Leaguer centre and rear pipe with a super metal cat down pipe to my STi 6. Has anyone got any history with this exhaust system? - I have not heard much about product apart from at David Hendry Subaru Garage where they sell them. Are the props in the rear pipe just a gimmick which can go wrong or do they really help gas flow?