these are for use with the stock steering in a 49-54 chevy car with a v8. they were bolted on an engine fired once and then never used and taken off to be put on a shelf for a few years. my project took a different direction and I am going back to an inline 6. they have the usual shelf life surface rust and I can't seem to find one of the collector flanges. Sanderson sells them however and are easily available. $175 plus shipping. thanks.