Active Autowerke BMW 135i 335i 1M E82 E9X BOV Kit with Charge Pipe for N54BMW 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 u00a0you can take HP to