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The Helix Blow Off Valve (BOV) Kit replaces the stock diverter valves on the BMW 135/335 cars and allows you to safely release boost pressure to atmosphere. The helix BOV kit helps prevent compressor surge and reduce exhaust gas temperatures by allowing excess air to escape instead of recirculating, which slows the turbine wheel response. This becomes even more important once boost is raised because the engine will require a larger volume of air to flow between the turbo and the inlet of the engine. By reducing compressed air surge, the Helix BOV kit prolongs engine life.
Due to superior design and extensive spring testing, the Helix BOV does not cause check engine lights or problems with idle. It sounds stock under normal driving conditions, but will add that traditional turbo 'whoosh' to your BMW 135/335 under heavy acceleration.
Helix's kit includes high-quality machined elements and is easy to install using normal hand tools. There is no cutting or drilling necessary and is easily reversible.
FITMENT: 2007+ BMW 335, 2008+ BMW 135
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