N54 BOV Line Upgrade For BMW 1M, 135i, 335i, E89 Z4, E60 535i 428i (F32) Chassis: F20 / F21Compatible Models:

Chassis: F20 / F21Compatible Models:

Significant Power Gains: Experience gains of up to 10+ horsepower to the wheels at 25psi+ boost levels

The JB4 features a simple plug and play installation harness for easy installation and includes many features not found on any other tune

reliability

3rd gear runs

N54 BOV Line Upgrade For BMW 1M, 135i, 335i, E89 Z4, E60 535i 428i (F32) Chassis: F20 / F21Compatible Models:The ARM N54 BOV Line Upgrade will help your BOV open and close completely and quickly. The ARM N54 BOV Line Upgrade allows you to replace the standard 1 8" line with a 1 4" line, doubling the size to allow ample pressure. Upgrading the diameter of the vacuum line running to the BOV ensures proper BOV function. With a smaller 1 8" line you can experience surging or over boosting if the BOV is not activating properly. HIGHLIGHTS Allows for 1 4" Vacuum