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 the Pfaff Pro Exhaust enhances

the Pfaff Pro Exhaust enhances the performance and acoustic signature of the McLaren 650S and 12C

If your Mercedes-AMG is equipped with factory exhaust valves

3 Series COUPE' (E92) 335 Xdrive 3

but improves both vehicle handling and performance

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 the Pfaff Pro Exhaust enhancesRENNtech 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