LOL. The first time you nail it and change gear - you'll realise why it costs so much.
Very nearly soiled myself first time I heard it.
Incredible piece of kit, but - it does need some work to fix it down properly - has a habit of working itself free. Thread lock will be your friend.
To get mine fixed: -
1) thread lock on bolts
2) uprated engine mounts stop the engine and kit rocking around
3) Sticky velcro buttons on underneath of airbox and top of OE brace
It doesn't move. At all.
Also get yourself some K&N filter cleaner - it's a kit - I got mine from an Aircraft servicing place online dirt cheap. Not used it yet though because it says only to use it when the filter is absolutely totally filthy dirty - that gets the best results.