The Pro Design Pro Flow Airbox Filter Kits for the Yamaha YFZ450 replaces your faulty stock and restrictive air filter and adaptor to give you the performance you want. Your filter can now remain in place without the restriction inherent with the stock mounting lid. It features a unique port base plate which forms a perfect seal at the front of the filter for a dramatic improvement over stock by preventing dirt or debris from getting into your intake. With the Pro Flow Kits, in dry conditions, you can completely remove your airbox lid and maximize your air intake!
Fits: Yamaha YFZ450 All Years