Charcoal filter removal?

I've researched several forums and can find little information about the charcoal air filters.

I've read that they have beneificial effects on power and an added benifit of an improved exhaust note. I like this. It's cheap and yields positive results.

My questions: ( for those of you who have done this)

What tools would I need?

How much time does it take?

Where is the filter located?

Was modification worth the pita?

Thanks in advance,

ricosan