They're JR filters. Jabba used them on their induction kits but ditched them in favour of K&N. I had one on my Jabba kit and it made 185g/s on a Custom map. They are excellent filters.
You'll need some form of bracket to hold it steady or it'll rattle around and kill your MAF.
Without a doubt. Turbo spools up so much quicker over the standard air box. Also sounds fantastic so it's worth doing
Not on a standard car, the biggest restriction is the standard downpipe and cat. You won't notice much difference other than the noise on a standard car.
mine did, infact you can see it on the boost gauge
mine did, infact you can see it on the boost gauge