X5 & X6 M-Series S63 Computer Upgrade
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Computer Upgrade Gains 50 HP & 60 lb-ft TQ Engine management computer upgrade for the 2009+ X5 M and X6 M models pushes the potent twin scroll, twin turbocharged S63 4.4L V8 to nearly 600 HP. Note: This mail order upgrade requires the removal and shipping of engine control module (ECM) to our facility in order for the upgrade to be performed. Please contact our sales staff at (979) 885-1300 or at sales@hennesseyperformance.com for more information. |
