I purchased one of these three years ago or so from Geno's Garage for my then, stock exhaust system. It's a very high quality, great looking product. I didn't have to tack weld, clamp or screw the tip on, a tight friction fit held it firmly in place.
You will receive installation instructions/tips from Geno's Garage with your Meg's tip that will further explain the process.
BTW, Geno's Garage provides superb customer service... I have been dealing with them since the late spring of '98. Excellent products with unmatched customer service!