Well sounds like you don't want to put the effort into getting them on that tells me one thing..lazy
After you pay for return shipping you really are better off keeping down they will flow better then porter manifolds, now a manifold/downpipe combo would probably be comparable. There's guys trying to help you, you just need to post some pictures so we can see what exactly you got. I'm sure they for right it's just a bit of a art to get then on correctly.