JB4 Plug-and-Play Performance Tuner – Mercedes-Benz C300, C43 AMG, E43, GLC & GLE

The JB4 Performance Tuner enhances power output for Mercedes-Benz turbo vehicles through intelligent tuning of boost, timing, and fueling.

• The description claims up to +50 WHP on C300 models.
• The description claims up to +120 WHP on C400 / C450 models.
• The description claims up to +80 WHP on C43 AMG models.
• The description claims boost pressure is increased by approximately 3–6 PSI.
• The description claims the JB4 features full CANbus OBDII integration.