N54 BOV Line Upgrade For BMW 1M, 135i, 335i, E89 Z4, E60 535i 428i (F32) The JB4 features a simple

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

it does require the removal of your front bumper

and performance to your BMW

3rd gear runs

Connection style: OEM Weatherproof Quick Connect

N54 BOV Line Upgrade For BMW 1M, 135i, 335i, E89 Z4, E60 535i 428i (F32) The JB4 features a simpleThe 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