ej208 fuel lines leaking under intake manifold

i recently changed the 4 fuel pipes under the manifold of my 2001 legacy gtb, i took it for a drive after the repair and after about 30 minutes, i lost power and had a fuel smell due to the new pipe splitting and shooting fuel out. is there anything that could have caused this other than a poor quality part. the split can be seen on top of the pipe on the left side