Tig welding not the easiest thing to do especially aluminum. The replacement I got had welded tanks and was painted. The intercooler being 1 stock part i thought I’d never have to replace.I didn't even look to be honest. I am shocked they just used a machined surface to seal and bent tabs to secure the end tanks. I was half tempted to take my old intercooler to have the tanks welded but I figured given how cheap these are it wasn't worth it. I really need to learn how to TIG.