I wouldn't weld it it. If you weld it, you just threw your money out the window. Mufflex's claim to fame is the ease of install. Install it yourself with some hand tools. Then, find a way to get it on a lift, and use an impact to send it all home. There is just no way you can do a tight, quality install with a wrench on something like this. You really need the torque from the impact to secure it. Hit it again after a few thousand miles or when (if) you hear a leak.