The Cylinder Head of the BMW 550i effectively facilitates breathing and ensures leak-proof sealing. Thus, it unlocks the full punch of the twin turbo V8 while managing temperatures. The Cylinder Head features a low mass aluminum construction that enhances heat dissipation and allows for higher compression and powerful combustion without detonation. Torque to yield bolts are also applied for every Cylinder Head to uniformly clamp the gasket, permitting oil and coolant to only flow in their intended passages, even on high-stress engines. Optimized intake ports and exhaust ports sculpted within the Cylinder Head enable an unimpeded flow of air in and out, allowing the input of the throttle of a 550i xDrive to translate into an instantaneous response as soon as the driver taps the pedal. Consolidated cam and rocker supports inside the Cylinder Head resist high rpm loads, adding long-term durability that boosts the model's reputation for reliability. All 550i xDrive equipped cars, from launch year to later production runs, can use the same advanced Cylinder Head, allowing for unit swapping so owners can enjoy their cars on the road instead of off it. Both an early 2011 BMW 550i xDrive and a final year BMW 550i xDrive will have the same coolant passages and sensor ports on the Cylinder Head. As a result, installation will be straightforward. The component, by removing mass high in the engine bay, improves weight distribution, refining the balanced feel that allows a BMW to corner with poise and stability. The BMW 550i xDrive is equipped with a Cylinder Head that enables cleaner combustion for fewer emissions and better fuel mileage to supplement the traction aids and brake-based safety systems already onboard. By combining sheer power with outstanding efficiency and sophisticated protection, the BMW performance sedan is hard to beat.
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