[yimmy149]

I'm not sure how Porsche handles it, but typically replacement engines come in two forms: short and long blocks. I'll steal the descriptions from another website:

Short block = the engine block without the head (block casting, pistons, rods, crank, etc.)
Long block = the complete engine, including the head (engine from valve cover to oil pan)

Neither would include the exhaust manifold, pre-cats, cats, etc as far as I know.

-james