Lexus JB4 Tuner

JB4 True Plug & Play Power

This plug and play tuner attaches to easy to access sensors in your Lexus engine bay and works with your factory DME tuning to remap your boost, timing, and fueling for optimal performance and reduced turbo lag. It features a 64mhz processor allowing sensors to be sampled 800 times per second using dedicated 10 bit digital to analog converters, ensuring smooth and powerful performance.

No ECU flash needed and compatible with locked ECUs

Power gains are up to 45 crank horsepower and up to 45 crank torque over stock, at the default map1 setting. With race gas or E85 mixtures, higher power gains are possible. Boost is adjustable using a BMS Data Cable or Bluetooth adapter. Includes fully OBDII based CANbus operation for unrivaled tuning performance, features, and functionality.

Installation is very discrete and it quickly removes without a trace when needed. Fuel economy during normal driving is unchanged.

JB4 Features & Benefits

Increases horsepower/torque making your Lexus faster
Improves 0-60 and quarter mile times.
Includes multiple tuning maps for different fuel types.
Quick plug and play installation.
Supports E85 ethanol blends.
Reads and deletes fault codes.
Displays and logs up to 40 engine parameters.<