[rdorman]

Jim and Ed. While the dyno person said it looked blueish grey, it looked more like black to me. Jim your point about the sniffer could be valid. If I had an exhaust leak where the headers join the side pipes I doubt I would hear it! I do remember when the GT-40 was on the dyno the kept saying it was lean. Each time they richened up a bit. By the last run it sounded as though the car was going to barely run. Maybe he was getting a false reading.

Hmmmmmm, now where is my plug socket and magnifying glass?