Complete Installation Guide — ReDo Swirl Flaps on BMW M47/M57
6-step guide: 1) prep, 2) remove intake manifold, 3) inspect/clean, 4) install flaps, 5) gaskets + refit, 6) reconnect + test.
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6-step guide: 1) prep, 2) remove intake manifold, 3) inspect/clean, 4) install flaps, 5) gaskets + refit, 6) reconnect + test.