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BMW 550i 4.4T 460Hp - Stage 1 |
Upgrade stages from 550 Hp for the 4.4T engine found in BMW X5.
Stock engine specs: Capacity: 4395cc Power: 460hp
Stage 1: Engine upgrades: -Stage 1 Software upgrade Engine performance: Power: 550hp
Software upgrades: Boost control is achieved using the OEM ECU and N75 valve. Use of 95/100 octane fuel is mandatory.
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