Ok, I replaced the grey fuel line that had the red lettering, and put on the grey with the blue lettering. That seems to have solved the problem, in fact, the Cat is running like a scalded dog. When I cut open the fuel line, you could see the laminated liner that is supposed to be glued to the inner wall had come free and collapsed and was restricting the fuel flow as the engine was demanding more fuel at higher speeds. Hope this solves it. All else seems to be running great!
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