The BMW 440i xDrive Exhaust Manifold quickly moves hot gases away from the engine to ensure clean air and fast turbo response, whether you are driving it every day or on weekends. This precision Exhaust Manifold attaches to the cylinder head to funnel six separate pulses into one clean stream. It protects passengers from inhaling fumes while maximizing catalytic efficiency. All newer BMW 440i xDrive models are equipped with a lighter stainless steel unit that heats quickly and is rust resistant. Yet, earlier cast iron units are virtually unbreakable even in extreme temperature changes. The reliability record of either option maintains the model as the Exhaust Manifold usually does not crack and allows easy breathing for the straight six. The equal length runners provide evenly timed pulses so that the turbo spools faster and gives a sharper throttle response, more mileage and lower under-hood temperatures that enhance safety. When leaks occur, changing the Exhaust Manifold allows the engine to run at full power with the proper air fuel ratio. It also stops the carbon monoxide from being able to enter your vehicle before it has a chance to hurt the people inside. The single part fits coupe, convertible, and Gran Coupe versions of the BMW 440i xDrive with either transmission, making for easy stocking and swapping. A factory gasket squeezes tight against the Exhaust Manifold flange, preventing whistles and allowing the computer to hold perfect ignition timing. The assembly's low positioning reduces center of gravity, while close proximity to the block keeps the BMW 440i xDrive steadied through cornering. Mixing great metallurgy with fine machining makes the Exhaust Manifold stand out from the crowd even without any extra sensors or wiring. Based on what the owners say, the BMW 440i xDrive retains full torque after insistent hard launches due to the sealing rings guarding the Exhaust Manifold from warping. Combining strength with smart gas flow, this component helps every 440i xDrive deliver the kind of enthusiastic performance drivers expect from BMW.
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