As I left my office last week I spotted a Cobra in the parking lot. Of course, like a moth to a flame and since I don't yet own my own Cobra I went over and introduced myself. He told me he just hauled it down from Wisconsin. He told me it was an SPF (man, it was gorgeous) and he had a 460 in it. After a brief conversation, I took my leave, and gave a listen while he fired up the motor. The sound that the big block combined with the SPF sidepipes was nothing less than music to my ears. It was far from quiet, but not what I would consider excessively loud either. It just sounded great.