Hmmm, what filter does it use??? Also, it looks a lot like the airhammer one (which I have). Personally I think I'd have been better off with OTR, but it comes down to cost/preference. I'm quite happy with mine, but don't expect big gains or you'll be disappointed. Can't really tell you what to expect as I've only got a 6, probably a different pod and fitted a MACE manifold insulator/spacer at the same time. So I'm not sure which bit made more difference. Prob the spacer. (The spacer for mine was something like $150 - worth looking at what he's got for yours, and he's a sponsor of this site.)
About the only downside I see is that it (well the airhammer) does sit quite low down. So I am a bit nervous driving through water. Well actually I crap myself sometimes if I have to drive through it. But hasn't gone wrong so far (been 6-12 months). Might not be so much an issue in Melb?
Hope that helps a little, and someone can give better advice 4 ya.
