BMS JB4 Stage 2 N20 N26 (320i 328i 520i 528i 428i )
Burger Tuning N20 stage 2 JB4 ECU tuner for the BMW F chassis N20 engines. The BMS JB4 stage 2 adds instant power to a fully stock N20 BMW ( 228, 328, 428 or 528).
o Up to 35 wheel horsepower on a fully stock car
o Code reading and deleting
o Limit boost by gear for better traction control
o Limit boost by RPM for 100% boost control
o Ethanol support
o 7 preset maps for maximum safe power