Dana67Dart, Thanks for the reply. Its called a anti rattle spring and its on the opposite side off the thermostat coil on the 65 Barracuda 273 exhaust manifold. It sets in the two grooves that are on two pins that stick out. And if I had a picture I would post one but I read up on it and it stops the Heat Riser from (Rattling). I don't know exactly what they look like so that's why I ask. Thanks Joe
