Nahh not rolled… remember I made them out of stainless J bends all tigged up. The T-Bolt clamps I have on the couplers hold fine but the shitty hose clamps I have on one of the couplers keeps popping off even with 2 side by side. i miss-ordered a t-bolt clamp and need to fix this.
If the t-bolt clamps start poping around 24+ I will just take the pipes off and run a bead of weld around the pipe to make a rolled lip on the ends.