JB4 Tuner for 2025+ Land Rover Defender 4.4L OCTA V8 Twin Turbo - Burger Tuning Select:JB4PRO Adapter (Uses Free JB4PRO App) The JB4 is a plug

The JB4 is a plug & play tune available for turbocharged vehicles

The JB4 is the most advanced and highly featured tuning system available for your B58 powered INEOS Grenadier

significantly simplifying installation

The N20 has a stock downpipe with a catalyst that drastically restricts exhaust flow

With that said we have developed this manifold cover giving Silicone products yet another barrier from very hot Turbo Manifolds

JB4 Tuner for 2025+ Land Rover Defender 4.4L OCTA V8 Twin Turbo - Burger Tuning Select:JB4PRO Adapter (Uses Free JB4PRO App) The JB4 is a plugGains 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