JB Plus N20/N55 Quick Install Tuner

Plug in up to 35 extra wheel horsepower in seconds! Finally, our popular and well-proven JB Plus quick install tuner is available for N20, N26, and N55 applications! Boost is user adjustable up to 4psi over stock providing gains up to 25 wheel horsepower and 35 wheel torque on the N20/N26 motor and up to 35 wheel horsepower and 45 wheel torque on the N55 motor. Timing and fueling remain managed seamlessly by the DME, preserving all factory safety systems. While the JB4 is the ultimate tuner, the JB Plus is a quick and simple way to add a few HP with minimal cost and minimal installation effort. Something that anyone can buy, install in under a minute, and feel from the driver's seat. Compared to our Stage 1 tune, it offers a lower cost and easier installation but lacks the additional benefits of MAP sensor control and data logging. Depending on the settings and conditions, expect a little less horsepower than Stage 1, all else being equal. Fuel economy during normal driving is unchange