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BMW 7 Series Performance Parts - F01 ALPINA B7x

The Alpina B7 is based on the BMW 750i and the 750Li and uses a modified version of its 4.4-litre N63 twin-turbocharged V8 engine. The modifications include large 44 mm (2 in) Honeywell turbochargers, reinforced cylinder heads, NGK spark plugs, high strength MAHLE pistons and an Alpina specific ECU. The maximum boost pressure of the turbochargers is increased to 14.5 psi. These modifications allow the engine to generate a power output of 507 PS (373 kW; 500 hp) at 5,500 rpm and 700 N⋅m (516 lb⋅ft) of torque. The maximum torque is generated at 3,000 rpm, 1,250 rpm less than the previous model. To cope with the extra heat from the engine, an additional radiator, external engine and transmission oil-coolers, a high performance 1,000 watt fan (shared with the 760i) and larger intercoolers with large diameter water lines were installed.