I have the complete Miltek exhaust including Miltek catless downpipe , don't know if it makes a difference in performance but it makes a difference in sound :)
I have the Miltek resonated with catless downpipe , very happy with it , but I told here before if you don't drill a very small hole in the rear silencer it gets full with water (condension) , I once removed a Miltek from an FK8 and there was between 5 and 8 litres of water in the rear silencer...
I live in Belgium but only drive at the Nurburgring for 11 years now , 10 years with a Renault Megane Rs but from last year with the Type R..
Mods : PRL intercooler , Miltek catless downpipe and 3" exhaust , whiteline antilift kit , hard race lower ball joint for more camber , eventuri intake...
Already contacted them today ,not easy to explain to them but I suppose after a lot of chatting they finally understood me and they promised me to send the updated bushings....
Mmmm, gets complicated now , according to Blinkerbeat the revised bushing he got was partnumber 69156 , but if you got the longer one the partnumber should be 69192...Is it possible you could look up the partnumber on your revised bushing ?