Air then flows through the heads, out through integrated aluminum exhaust manifolds ... company will continue to offer the 6.6-liter Duramax V-8 turbo-diesel in its heavy-duty trucks, and its ...

These days, the Duramax namesake is as linked ... GM also revised the LBZ's turbo inlet manifold to a more free-flowing design, decreasing exhaust gas temperatures and delivering better turbo ...