what gasket goes between head and manifold, and between plenum and manifold??  Same one?

ok, ive been reading about this turbo and that turbo, but i havent a clue as to what all those numbers and letters mean.   ex. 12a, 14g, 16g, 17c etc.   now ive read about a tdo5 exhaust wheel and a tdo6 and a tdo5h wheel.  what does all this mean and how does these different sizes of turbos affect h.p. ?   please break all this down as simple as possible.

I have a problem. I just traded for a new interior, and the interior has 5 or 6 small cigarette holes/burns in it. The interior is black/gray cloth mix, not leather, so it won't be an easy fix.   There are several holes on the side bolsters (black in color) on the front seats, there is one or two small holes on the gray middles of the seats, and there are two BIG ones (size of a nickel) on the rear seats (on the black cloth part).   Is there anyway I can sew these? Have them fixed? What are my

I purchased two HKS aluminum pipe elbows from him, and everything went as planned. They were still in the OE package( like he said they were ), and he even shipped them in the box that he originally got shipped from Japan.  I would definately buy from him again, he gave me tracking numbers but the box came the next day, so I didn't even get a chance to check them out...   Very good experience's with MANGO...     John