replaced cyclone filter with ebay delete pipe just now, drove to bottle shop and back. Pretty straight forward afair, seems good quality and good fit after some trimming and chamfering and sikaflex. Needed a 3" silicone straight joiner tho. Looks like it would flow a lot better than the tiny ducting that was on the cyclone filter. Its definitely louder, cant say i could notice it going any better tho. Ill see how it goes for a bit but think i might put the prefilter back on. 110kw diesel induction noise is ****en gay and irritating.