I found some exhaust headers that are a Nicson (I think that is the spelling) brand. They are aluminum tubes, about 4" in diameter and have two inlets that look like coolant fittings. The front peice (with the coolant fittings) looks like it will come off with 3 bolts. The rear is wide open with 3 studs. I believe they fit a small block chevy (not sure yet). They look to be in perfect shape. Can anyone tell me about them and their value. They are for sale but no one knows about them. I don't want them for me, but am willing to help someone get them if wanted.