The 57 wagon exhaust is creating a tapping noise. Inspected the headers and the ox2 sensor wire is charred near the header tube. Also before the collector the header tubes have long flat spots from speed bumps? I'm guessing a header gasket has a burn hole. The 57 has 2" dropped spindles. The engine is a 350, alum heads with straight plugs, somewhat lumpy unknown cam, unknown headers, alum intake, and FI Tech fuel injection.

The plan is to install Sanderson ceramic coated cast iron exhaust manifolds for more ground clearance. Do not want headers. It looks like the Sanderson manifolds will come too close to the spark plug wires tho. See photo. I kinda like the looks of them but will early Corvette-style 2-1/2" ram horn manifolds be less troublesome? Hoping to here from someone who has first hand knowledge with cast exhaust manifolds. Price is not an issue. Thanks, Chevy Chase-Sanderson-Headers-QP1000 (2).jpg