FWIW, the intake in your avatar is not a RAM air intake. It's a short ram intake, also known as a "hot air intake". If anything, it's a performance downgrade. As for LSD, If you jack both rear wheels up off of the ground, spin one by hand and watch the other, if the other wheel spins the opposite direction or doesn't spin at all, you have an open diff. If it spins the same direction, you have a LSD
BTW, what's the point of a fiberglass dash?