Apparently, some low-po cars also come with headers from the factory.
My 318i has headers, although I guess it's fairly hi-po for its displacement, and it does make a lovely snarl when wound through the gears.
The rest of what was said above explains why most engines come with cast iron exhaust manifolds.
My 318i has headers, although I guess it's fairly hi-po for its displacement, and it does make a lovely snarl when wound through the gears.
The rest of what was said above explains why most engines come with cast iron exhaust manifolds.