Engine Management

Power gains of up to 80hp to the wheels on a stock vehicle!! The JB4 is the most advanced and highly featured tuning system available for your A90 Toyota Supra. Power gains are up to 80hp to the wheels (100hp crank) on a completely stock car on pump gas...

The JB4 performance tuner for the new 2023+ Nissan Z shows dyno proven power gains of up to 100hp and 120tq to the wheels on a stock Nissan Z!!  The plug and play unit attaches to two easy-to-access sensors in the engine bay and works with your...

JB4 without fuel wires is CARB Approved Under Executive Order (EO) No.D-744-6 for all 2016+ Infiniti Q50/Q60 3.0L Turbo Luxe, Sport, Silver Sport, Red Sport and available for sale in all 50 States. For those not living in California and would like the...

The JB4 with fuel wires is non CARB Approved and NOT for sale in CALIFORNIA. For those that reside in CALIORNIA, you can order the JB4 without fuel wires and billet enclosure from HERE. Power gains of up to 100hp and 120tq to the wheels on a stock...