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The N52 features Valvetronic (variable valve lift), a lighter block due to the use of a magnesium alloy and an electric water pump (replacing the belt-driven water pump) and a variable output oil pump. The redline was increased from 6,500 rpm to 7,000 rpm, except for N52B25. The N52 uses electronic throttle control and variable valve timing (double-VANOS). Higher output versions of the N52 use a three-stage variable length intake manifold (also called "DISA").
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