Pacbrake C44083 Max Flow Elbow

The PAC brake elbow came with everything listed . Easy to install . I’ve cut, & rewelded the ball type flange 3 times making sure it’s centered on the elbow. Leaving it loosely for until centered, & clamped before tracking it in place . It seems to work fine until I turn on my exhaust brake . Then it starts leaking . I was able to get it somewhat better by tapping the clamp while wrenching it down as tight as I could , but it still leaks …the 3”-4” down pipe turbo v-band I replace this one with I had No problems with the straight heavy flanges leaking . I’m a certified pipe welder off over 30 yrs . The flange on the short flared piece of pipe they sent is so thin it leaks at each space between the v clamp s jaws .