Has anybody done the ECU reprogram from singhautosports?

For the 50i, they claim gains of 80hp 66lbs tq (various tests have shown higher tq numbers)

Also removes the speed limiter/hesitation/flat spots, raise the rpm, etc.

Cost = $1245

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In the garage
2008 Infiniti G37S Coupe (Traded)
2011 BMW X5 xDrive35i
2011 BMW X5 xDrive50i