Question: If a normal N/A exhaust manifold on a good tune runs 200-600F could you theoretically cast one out of Aluminum? I know that sounds ludicrous but AL has a melting temp of 1000-1200 and can be cast with hobby grade equipment. Corvairs and Pontiac offered them to drag racers...Just a thought to cast Hyper-pak style 2X3 trees in AL for a mild build.
I'm probably wrong about this, but I think the tensile strength of aluminum would prohibit its use for headers on a street car. Too much flexing from the rest of the exhaust might cause an epic failure.
Please correct me if I'm wrong.
