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Aside from the expense is there any speculation of a long term helping solution (not fix as that won't happen) aside from a catch can and meth which is still debatable of how much they help. Possibly a set of polished SS vales, polished ports (since it's DI the ill affects of truly polishing might help) and then on top of that maybe soaking the valves and ports in a recommended snake oil lubricant that adheres to metal.
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