Muffler has quality welds! I used it on my 1994 Toyota Land Cruiser along with other stainless steel multiflex pipes and V-flanges that are all welded together. Muffler measured at 24 "Tubes end to end with 18" x 9" x4" housing dimensions LxWxH inlet tubes have a 3" internal diameter. The sound is good but I wish it was quieter. I have a T4 Turbo and high-flow catalytic converters (2 pieces) which dampen the sound a bit, but that's not enough for me, so I add a resonator (Vibrant 1142 3 "Ultra Quiet Resonator"), which is also made by me being tested and purchased from Revain. When welding, make sure you passivate the welds to minimize corrosion.