Sorry my mistake it has a performance filter ! I'm new on this site so don't really know what I'm doing ! It's taken me a week to put a pic on ! I'll get some more pics on tommorow ! I'm after a roll cage and all the strut braces if anyone has any and a steering wheel with boss ?
Thought so, its not a prob mate as we where all once beginers on this site

I would suggest though that you do have a real tinker around the engine to see if you can tell what else visually has been done. Performance filters actually give good gains against some induction kits. Has the airbox had any holes drilled in it that you can see? If you not sure take the filter out and see the inside of the box.
I looked at getting a mk3 vr6 before i got my mk2 and was thinking a long the same lines of you by stripping it out fully and get it track spec. At the end of the day iwas wanting something that would put a smile on my face and at least you have the right idea mate

Cant help on the roll cage but i am sure someone will know of someone who can. I do know a very very good welder who has built a fare few roll cages in his time who would be willing to make you one???