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Port Matching a Nitro engine header manifold HPI RS4 3 exhaust mod Part 2 port match with a Dremel

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NitroTalkwithTodd

3 part series where we take a stock HPI rs4 3 evo, test for top speed(part one) then I do an at home port matching with the Dremel(part two) then I test for top speed improvement(part three)

posted by salvita93cw