enclosed induction kit

I was wondering which kits have been used on mini one gen 1?

Read a lot of positive things about the piper cross viper.

I have also found such as 'simota dragon' or the 'k&n Apollo' !

Has anyone used these or similar?

I gather that an enclosed induction kit prevents warm air being sucked into the engine which is why I am after an enclosed one so I can use a old air feed!

Cheers, Chris.