Only reason I ask is that the
JCW kit I initially test drove sounded nicer than my own, and after posting on here it seems the noise I experience on my car is normal for the kit.
The car I test drove had more of an induction growl and you could hear the stock blow off more. It could have been something silly like the airbox wasn't connected correctly or something, I never did get to the bottom of it. Just wondered if changing the filter could produce a similar result....