Here are some pictures of subsonic transverse injection and shocks created in a wind tunnel test.

Dr.V. It's about time to replace that. The pipe had already discolored on the outside, so it has become more brittle and lost 1/2 of it's strength. The welding spots at the mid section seem to be pulled apart. Most of the pipes are over engineered so they will hold for a while but why take chances when you know the risk has formed.

Mike