I’m happy the U-bend collector. Decent quality. I needed a muffler added to 73 BAJA I went this route because I didn’t want to spend $$ for a Tri-mill brand which are the pipes. I had to use expander tool on the 4 inlets to fit over the 1-1/2″ pipes correctly. Came with springs, nice, I wasn’t expecting those. 2″ OD. I have driven 3 hours solid and the paint in still good