JB4 is a plug & play chip tune for turbocharged vehicles. The JB4 comes preloaded with custom tuning software and up to 8 maps for various fuel and modification levels. The JB4 installs between your car's sensor and its DME/ECU (computer) and manipulates vehicle performance through these connections. Installs and removes without a trace. 5-year warranty. Free shipping in the USA. Made in the USA.
Questions? Read the JB4 FAQ or ask the pros at firstname.lastname@example.org