It is NOT a replacement for the factory pan. This expanded pan is made to fit on top your existing pan, and be attached to it. It is made from 16 gauge steel, and comes ready to weld on your traps. It can also be bolted or riveted to your traps, but does not come with the required hardware.
Note for installing these: Each CDR trap is slightly different, so the exact location where the expanded pan will fit on the factory pan needs to be tested before final welds. The best way to fit it is when the trap is sprung. Set the expanded pan over the factory pan, and line up the pan so it fits on the springs. Take a vice grips and hold the expanded pan on the factory pan in this position and weld.
Expanded Pan - Larger surface area than a stock pan.
Made specifaclly for the CDR trap, to fit on top of the existing pan to make for easy instalation. Pan fits between spring, and pan always has a full range of motion.