Quote: coming off the exhaust manifolds may be different than headers when it comes to heat. Headers will get rid of heat faster than iron manifolds if that is what you were using at the time. Aluminum flex tubing is not 6061 and the wall thickness probably thinner as well.
Yep, your right, the flex tubing was thin as I remember, and it was coming off exhaust manifolds, but 2 feet back or so off of steel pipeing.
