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Message: <blockquote data-quote="Mr. OAM" data-source="post: 392060" data-attributes="member: 9816">Being in the industry I'll try to shine a little light on this. It will be difficult to know whether to pin this on BBK or Edelbrock........we have changed our shafts and the internals of those throttle bodies since we stopped making them for Edelbrock to their specs years ago.This is BBK saying that the throttle body was built to Edelbrock's specs which is BBK saying that the failure is due to Edelbrock's design.On the flip side, it is possible that Edelbrock merely specified other characteristics of the throttle body and BBK chose how to meet those spec's. If BBK chose to cut some corners on the engineering of the throttle shaft then that is on BBK.These two explanations are why I say it will be difficult to know which company is at fault. By the mere fact that there are no more of these shafts and they have changed the design says that it is known that the previous shaft had a flaw. Looking at your pictures of the shaft it broke right where it should, where the hole is drilled through thereby making the weakest section of the shaft due to the least amount of material being present. Evidently the shaft was too thin, narrow, or otherwise light in this area.This is just like the situation between Summit Racing and Barry Grant. Each company told me that they dropped the other. We'll never know for sure how it went.From the response you got from BBK I would use the throttle body for scrap aluminum. It sounds like it is known to be a flawed design. At least you didn't lose anything on it.Steve</blockquote>