Got one about 4 years ago, no leaks yet.
What you do is get some muffler seal (ceramic in a tube) and put it on both sides of the slip fit. Then use a stainless STRAP, not a clamp, and let it dry overnight. It seals like a weld and the strap which is about 5 inches long seals it snug.
Don't strap it until you clamp down the passenger and driver sides.