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This video is a DIY on how to port a stock Honda prelude / accord H22 F22 F23 intake manifold to remove the butterfly valves and create maximum intake volume. This h22 intake manifold modification is a 3-5hr job with the right tools and right skills. I am using a harbor fright step drill and harbor friend 1/2 x 18” belt sander filer. Using a “Sawzall” would cut down on time splitting the butterfly valves out but be careful using it in the intake runners as it has a tendency to dent the aluminum (hence why I don’t use that method). This can be done