I used a pipe wrench on my SHO. Worked great. However, with my GF's Jetta it would turn the piston, however it wouldn't retract it back in. Off to Harbor Freight I went. $49.00 later I now have a pretty decent tool that can do a plethora of brakes.
I think they are rad. My buddy has a P100D and it is amazing, however....it has zero soul. He said he loved it for a couple of months, and then blah..... Really can't get a race because most people know what they are.
It depends on the application. If you are running stock turbos then a drop in filter in the stock air box is more then adequate. The stock air box is a ram air cold air intake. It is draws air from outside the engine compartment, and it flows more air then the turbos can actually use.