BMW 135I 335I 1M E82 E9X BOV KIT WITH CHARGE PIPE N54 BY BMW TUNER, ACTIVE AUTOWERKE15 002 BMW PERFORMANCE BOV KIT FOR BMW 135I, 335I WITH N54 MOTOR. Our single BMW BOV Kit and chargepipe sports a huge venturi, designed to handle excess pressure build up against the turbo compressor impeller blades, pressure at the impeller to stop spinning (a. k. a. Compressor Surge),which can damage the compressor wheel and shaft. With our BMW 135i 335i Performance BOV in place, the stock turbos are protected as the boost is raised you can take HP