[toddoky]

As a former Holley Engineer until recently, I can verify that the knock-off Holley pans are not made from the same castings. Their geometric features are different in areas that make no usage difference in some applications (like the C10), and huge differences in others (GM A-body cars for example). The Supershops pan is sourced from the same factory as all the knock-off pans and Holley offers it to get their share of sales from the cheap pan market.