best induction kit and what else is most cost effective mods

[Sparkyp23]

iv seen a ktr induction kit i like on the ktec website for £160, is this kit any good?
iv got a decat pipe ordered
I seen fast road cams on prima racing site for £295 any ideas of how good?
what is matched inlets and is that worth doing ?

 

[Jekyll]

Mate, have a search as it's been covered loads of times.