JB4 Performance Tuner for Mercedes-Benz C63, E63, GT, GLC, Including S models

Description

JB4 Features & Benefits • Power gains of up to 100hp and up to 135Nm on a stock vehicle • Improves 0-60 times and 1/4 mile times • Preloaded with custom JB4 Mercedes tuning software and up to 8 maps for various fuel and modification levels • Ethanol (E85)…