The Dinan S1 is rated at 590HP. On the press cars prior to release it was 600HP+, but they retuned to 590 HP. Those numbers are for a stock M550 with only the S1. The other items will not effect HP much according to Dinan.
Just ordered and looking forward to getting it installed at my dealer.
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2018 M550iX-Dinan Stage 1 | 2011 E93 M3 Convertible | 2002 E46 M3 Convertible | 2002 E53 X5 3.0 | 2000 E39 540i | 1998 E36 M3 | 1988 E28 M5 | 1987 E28 528i
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