The rear attachment point is at the spring hanger. It bolts on using the spring hanger nuts. One of the major functions of this setup is to strengthen the spring hanger attachment point on the chassis as well as serve as a stout sub-frame connector. All of the forces of the spring are sent through sheet metal that is at best, inadequate. Especially on a car that has some power and hooks. This is why HEMI cars have the spring hanger boxes. The factory found it necessary to strenghthen this area on a stock car, but most people never even realize this as an issue on a nice street strip car with good tires. A nice street strip car with today's technology tires puts way more abuse on the stock spring hanger mount than any stock HEMI car did when it was new. These sub-frame connectors transfer the energy across a lot more of the chassis of the car. Now, with this setup, the energy goes from the spring hanger mount, through the tube and all the way into the front sub-frame. This alone strengthens the car a great deal, especially on a hard launch.

Jack Irons Jr.
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