HKS SQV BOV Now Available on Evolution Racewerks Charge Pipes

Mike @ XPH

Platinum Vendor
Nov 18, 2016
Las Vegas
Evolution Racewerks are now offering the new HKS SQV Racing BOV and its associated flange for our N54 Engine Charge Pipe applications.
  • 2006-12 BMW 135i/1M/335i/335is (N54)
  • 2008-10 BMW 535i (N54)
  • 2009+ Z4 35i (N54)
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For more info on the HKS SQV BOV:
HKS original 3-chamber structure ensures the stable operation of blow-off valve regardless of the amount of pressure. Large 51mm valve performs great with high power and large displacement engines. Adjustable pre-load allows a wide range of application.
3-chamber System
Typical blow off valves require spring load settings for each vehicle specification. If the spring load setting is too low, the boost pressure may be relieved under high boost, and the desired boost setting may not be reached. If the spring load setting is too strong, the valve may not open at low boost.
HKS RACING SQV utilizes a reliefless type; therefore, it delivers stable operation at all boost levels.
Durability tests of over 1 million operations minimizes the chances of valve stick and achieves high durability.
HKS "RACING SQV" Structure, HKS Original 3-chamber System
HKS' original 3-chamber structure ensures the stable operation regardless of the amount of boost pressure.
As pressure rises in chamber C, pressure is applied to a single valve. The higher the boost pressure, the more pressure is applied to the valve, preventing leaks.
Throttle lift creates a pressure dierence between chambers A&B, opening the single valve. This creates the large air volume discharge.
The differential pressure in chamber A & B is eliminated as time elapses, and a spring reaction force closes the valve.


Jan 7, 2017
Hey Mike!
PM me your best priced shipped to 19004. Charge pipe and HKS for 2008 335xi E90.