Ready to take your MINI B38/B46/B48 turbo to the next level?
The JB4 is the most advanced and highly featured tuning system available for your B38/B46/B48 MINI. Power gains are up to 40hp to the wheels (55hp crank) for a B48. Gains with bolt-on parts, higher octane, E85 mixtures, and larger turbos are even higher. The JB4 features a simpl