Just take the pipes to a welding shop or if you have a mig welder, weld a bead around the ends. It actually works better then beading in my opinion. It makes a hump for the clamp to hold against and does not make an indention on the inside of the pipe. This is what I do with my customer’s car when I do custom intercooler pipes. I also did this on my 1st gen eclipse that ran 33 psi on and never had a clamp come off.