RENNtech ECU Upgrade SL 65 MY2007- (R230- 670 HP / 840 LB-FT) mercedes-benz-c-class--204-sedan---2008-2014--c-63--amg-black-series-esr3194090 Rated by RENNtech: 435 HP

Rated by RENNtech:               435 HP @ 5

no welding required

CLASS E SW (S 211) 55 AMG Kompressor Speedshift [2 Filters Required(HP:476Year:03> 06)

415awhp @ 5

More power isn’t the only performance benefit as our turbos spool quicker

RENNtech ECU Upgrade SL 65 MY2007- (R230- 670 HP / 840 LB-FT) mercedes-benz-c-class--204-sedan---2008-2014--c-63--amg-black-series-esr3194090 Rated by RENNtech: 435 HPRENNtech ECU Upgrade for 230 SL 65 AMG. Up to 670HP and 840LB FT. Gains: +49HP & +102LB 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