RENNTECH's new $3995 performance PKG1 for the 05-08 SLK 350 boosts the output of the 268 hp V6 to over 300 hp. That's 40 horsepower for under $4000!
This level of performance and torque comes from new RENNTECH headers and a RENNTECH ECU upgrade, which also raises the car's top speed from the factory-limited 155 mph to over 170 mph. As the copy above states: this package will change the way you look at Mercedes' 350 series cars.
Currently available for 05-08 SLK350 and GLK350