They are tig welded to ensure longevity. 2006+ 135i, 335i, 335xi, 535i, 535xi, 1M, X6, Z4, E60, E71, E89, E90, E92, Wastegate Rattle Repair Parts. Includes Repair Parts for 2 Turbine Housings. Fix Wastegate Wear, Which Causes Lose of Power and Loss of Boost and Bad Gas Mileage. Welding Flapper Tab On Arm Required.I also offer the Repair Service. Please Watch My Video On The Tutorial to install These Parts. Youtube Video Title: " BMW 135i 335i 535i N54 Wastegate Rattle Fix DIY ". The item "BMW N54 TD03 Upgraded Turbo Rebuild Kit & Flapper Rebuild, Repair Kit" is in sale since Tuesday, April 9, 2019. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Turbos, Nitrous, Superchargers\Turbo Chargers & Parts". The seller is "bmwracing_6" and is located in Stuart, Virginia. This item can be shipped worldwide.