JB4 Tuner for 2025+ Land Rover Defender 4.4L OCTA V8 Twin Turbo - Burger Tuning Select:JB4PRO Adapter (Uses Free JB4PRO App) allowing easy installation and filter

allowing easy installation and filter inspection

• 1/4" Vacuum Line

2014+) – Quattro – 2

significantly simplifying installation

Upgrade your BMW X3 or X4 fuel system with Precision Raceworks High Performance Fuel Pumps for enhanced performance and reliability

JB4 Tuner for 2025+ Land Rover Defender 4.4L OCTA V8 Twin Turbo - Burger Tuning Select:JB4PRO Adapter (Uses Free JB4PRO App) allowing easy installation and filterGains are 125whp on pump gas and up to 260whp on higher octane or E85 mixtures. The ultimate tune for your 4. 4L V8 powered Land Rover Defender OCTA. The JB4 allows you to go from factory stock to full race and everywhere in between. The JB4 installs and removes easily and includes many unique features not found in any other tune, including user adjustable 1st and 2nd gear boost limiting, smartphone integration, electronic wastegate control, ethanol