It's no real shock to find if you've not changed the inlet side of things that nothing much has changed, swapping from the Tyga pipes to o.e. (for a quiet trackday) did little to my '28, closing the airbox off (I still got black flagged for noise) made it mega rich, I could probably have gone down 3 or 4 sizes quite easily.
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread