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Is that the filter used on the mr420?
If so yes I am.
It's bigger. The difference in performance I can't comment on as I changed other things at the same time, but I'd say it is marginal. Bit more noise vs 57s I had before but then the turbo was replaced too.
I'd make that trip to Essex and get the 420 done then you'll see a whole heap of difference all round :smile:
 

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Im not as it goes .im running the itg2 so the whole end is drawing in air rather than just the centre

Now

Maybe there's say a little in it but the mountune one has a strip/band a good 1"wide and the kn is bigger still ahhhh but they both run reverse cone technology and they say that adds gains

Well here's my opinion every time I see a mountune race engine it runs a foam itg so hey I ran with that
 
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