BMS JB4 Beta Upgrade KitUpgrades your existing BMS Stage1 to a EA888 JB4 BETA system. The JB4 BETA features CANbus connectivity for more advanced tuning, direct AFR control, advanced safety systems for boost, air fuel ratio, fuel trims, and engine knock, boost mapping by gear for improved traction, integrated water methonal control, and much more. There is no longer a core exchange program available. After the upgrade you can keep your old Stage1 board as a spare backup.

BMW 4 Series

simple design offers a modern motorsport look

All clamps

14-16ga CNC mandrel-bent 2

Timing Belt

034Motorsport's high quality silicone replacement is modeled off the factory hose to ensure excellent fitment

All IE rods come standard with ARP 2000 rod bolts

Sold Individually (One Vehicle Requires 2 Mounts)

OE Part #   022-103-601-HA / 022103601 HA / 022 103 601 HA / 022103601HA

B3/B4 80/90/Coupe Quattro

to cope with the added stress of spirited driving

These mounts cannot pivot once installed and bolted firmly in place