The correct way, or better way, is to add a baffle at the midway point so half the ports use one pipe, the other half use the add on. But since the add on has a terrible angle, it doesn't flow as well as the factory outlet so the engine still doesn't run any better. Without doing some port work down in the heads, it doesn't matter what manifold you install. Cut that extension off, weld up the hole, and you have a good exhaust manifold again.
