It's really hard to get to cause it's under the engine and everything around it is cramped together cause the body is more compact than F30's. It makes a really sick sound, almost addictive. Everytime you release the throttle, the valve gives off a very pronounced high pitched hissing sound that turns the heads of people on the side walk or their drive ways even at low speeds. It's a very rare mod to have on any BMW let alone a 2 series. It's amazing.
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