Can anyone give me the specs off of a good set of sub frame connectors? I am a welder an i want to make my own but i would like to make them to look good and not just some junk i welded on the bottom of my car.

 

Sites like Spohn Performance tell you what they make their tubular SFC's out of, including tubing diameter and wall thickness. But it you look at the prices, and consider that they are jig bent, and powder coated, you might realize the price is not unreasonable.