RENNtech | ECU Upgrade | R172 | SLK 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 maserati-quattroporte--156---2013-present--s-q4--3-0l-twinturbo-v6--esr5790423 RENNtech ECU Upgrade for 166

RENNtech ECU Upgrade for 166 - GLS 450 BiTurbo 4-MATIC

X 5 (E70) 30 dXdrive (HP: 235 | Year: 06 > 10)

RENNtech's R232 SL55 adjustable suspension kit offers overall improved aesthetics and an aggressive vehicle stance while improving vehicle handling and performance

Requires 19” wheels for clearance

o-rings as well as a new transmission pan filter

RENNtech | ECU Upgrade | R172 | SLK 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 maserati-quattroporte--156---2013-present--s-q4--3-0l-twinturbo-v6--esr5790423 RENNtech ECU Upgrade for 166RENNtech ECU Upgrade for 172 SLK 350 BlueEFFICIENCY. up to 308HP and 285LB FT. Gains: +6HP & +12LB 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