JB4 Fuel Pressure Upgrade Kit for 2020+ BMW B58, S58, B48, Supra 718 The optional high quality Flow

The optional high quality Flow Matched Bosch® or IDX Port Fuel Injectors 42mm fuel injectors are offered in 550cc

This CNC machined bolt on adapter allows you to mount a single BMS WMI nozzle WITHOUT the expense and headache of removing

Read our FAQ and install the guide below

Power Gain With GTS Black (+99hp/+88tq)

2020-2024 G26 BMW 420i Gran Coupe including xDrive Models

JB4 Fuel Pressure Upgrade Kit for 2020+ BMW B58, S58, B48, Supra 718 The optional high quality FlowFinally an upgrade kit that adds a high fuel pressure connection to the JB4 for B58 B48 Gen2 and S58 platforms allowing direct control of fuel pressure and fuel trims. Most useful for manual transmission vehicles or those running heavy E85 mixtures on a locked ECU. It's easy to install and includes a replacement JB4 board and a fuel pressure connector harness that attaches to your existing JB4 harness. Note this kit is not compatible with Gen1 B58