Not louder, just better sounding. It's deeper, more burrble.
Better low end torque, better sound, and they look great. Takes about 4 hours to install. You'll need jack stands, stock manifolds come off with deep well 1/2" socket and collectors need 15mm deep well. To install headers you'll want a flex head ratcheting 1/2 inch wrench and a 17mm deep well socket for new collector nuts. I also used a jack under the H pipe to keep it in place.
Headers fit but wrong gasket.
The headers look and sound great. The technician could not install it at first because of the gaskets sent did not fit my 2012 RAM 1500. They had to modify a factory gasket to compensate for a sensor inside that had an odd shape not accounted for in the parts sent for these headers. Ended up costing me an extra 300$ for labor. Be sure they either send the right ones or you know exactly what the gasket should look like before you take to the install tech.