HUPs IN STRANGE PLACES

[Paul Singleton]

Originally Posted by RHClarke

What is it for? Here is a photo of the "S" stamped just forward of the two forward knee action shocks - the circle (a pencil outline to make it stand out) got sandblasted away:

The circle with the "S" inside is the trademark of A.O. Smith Ltd. This company has stamped frames for the automotive industry for many years.
Here is some history,

http://www.aosmith.com/About/Detail.aspx?id=130

Paul