Why is one 340 connecting rod bronze color?

The machine shop said that it was not damaged. Just a casting defect that should have been rejected. Both end holes were parallel still. No hammer marks on it.

I will not be running it again!


When the rod line gets short on parts, they raid the scrap bin to send anything to the engine line to keep from shutting it down...

I seen it happen.... I used to catch them at it periodically....