RENNtech | ECU Upgrade | McLaren MP4-12C | 644HP / 487 LB-FT bmw-3-series--e90-e91---2005-2012--335d-3-0-l-i6-twin-turbo-diesel--m57n2--esr8657637 Valves will stay open even

RENNtech | ECU Upgrade | McLaren MP4-12C | 644HP / 487 LB-FT bmw-3-series--e90-e91---2005-2012--335d-3-0-l-i6-twin-turbo-diesel--m57n2--esr8657637 Valves will stay open evenRENNtech ECU Upgrade for the McLaren MP4 12C. Up to 644HP and 487TQ. Gains: +44 HP & +44LB FT RENNtech has been at the forefront of ECU tuning since electronic engine management started to show up in vehicles during the mid 1980's! Our experience, countless hours of in house research, development and exhaustive testing ensure that our proprietary ECU upgrade offers incredible performance gains and rock solid daily driver reliability. RENNtech tuning

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