Review on TOTALFLOW TF JB56 Stainless Exhaust Muffler by Sangmin Barrett

I didn't like the fact that after a week these clamps would start to loosen due to the vibration of my 4" Cummins exhaust pipe even if I tightened them to specification. That's why I give it 2 stars, the clamps arrived on time, looked great, worked for a week, had to be tightened, loosened again, had to be tightened a week later. I take off the clamps and hire a welder. 1 of the 3 clamps I bought works great and didn't come loose, it was rock hard but the other 2 years they happily vibrate.