As far as I know the Borg Warner injector should look and function the same as the factory or dealer part. But I think the the problem is not the parts but how it is installed.

When replacing any primary fuel system component, it is essential the tank is inspected and cleaned for contaminates. If possible, have the tank steam-cleaned. Also, the return fuel line should be purged. Even if it is 70,000 miles later, the dirt and fragments from the damaged components could still be in the tank just waiting to be ingested by the fuel pump. Just a small particle of dirt or metal can cause damage to the internal surfaces of the injector. This is what is causing the fuel injectors to leak.

Also, check the fuel filter and change it every time a fuel system component is replaced.