RENNtech | ECU Upgrade | R172 | SLK 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 sprinter-sprinter-van-2-1l-inline-4-diesel-esr3516206 By modifying boost mapping and

By modifying boost mapping and keeping optimized air-to-fuel ratios

Comparing to alternative product

RENNtech headers are constructed of the highest quality T-304 stainless steel and are ceramic coated to further reduce latent heat in the engine compartment as well as combat against thermal stress

5" Weight:   Construction: 1-piece Forged Tire Size: 305/35-23

The tasteful exterior enhancements begin at the rear with a prepreg carbon fiber decklid spoiler

RENNtech | ECU Upgrade | R172 | SLK 350 BlueEFFICIENCY | 308HP/285LB-FT | 3.5L V6 NaturallyAspirated | M276 sprinter-sprinter-van-2-1l-inline-4-diesel-esr3516206 By modifying boost mapping andRENNtech 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