JB4 Tuner For 2014+ Mercedes Benz - Burger TuningPower gains are up to 50whp for the C300, up to 60whp for the C400 C450, and up to 70whp for the C43. On racing fuel or E85 mixtures even higher gains are possible. This quick install plug and play tuner connects to easy to reach plugs on top of the engine and safely increases turbocharger output by 3 6psi producing significant power and torque increases. Timing and fueling are appropriately rescaled for the increased boost and the installation is