RENNtech | ECU Upgrade | McLaren 650S porsche-911--997-2---2009-2013--gt3-esr2014754 CLASS C SW (S 203)

CLASS C SW (S 203) 55 AMG [Needs 2 Filters] (HP: 367 | Year: 04 > 07)

RENNtech Digital Lowering Module for Rolls Royce

giving the driver a dual-mode option for choosing a deep sporty sound or the more regular Akrapovič sound

Gains: +125HP & +168 LB-FT

RENNtech performance software unleashes your McLaren's true potential

RENNtech | ECU Upgrade | McLaren 650S porsche-911--997-2---2009-2013--gt3-esr2014754 CLASS C SW (S 203)RENNtech ECU Upgrade for the McLaren 650S. Up to 681HP and 544TQ. Gains: +49 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