Bypass valve

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a.k.a. "BPV"

Valve which relieves charge pressure by venting air back into the ambient pressure intake tract.

Prevents turbo surge but preserves LTFTs, since measured air will still eventually enter the combustion chamber.

All street cars that use MAFs upstream of a charge pressure relief system should use BPVs rather than blow off valves.

Variants:

  • 710A - original? (OEM for 2001.5?)
  • 710N - updated (OEM for which engine?)
  • 710P - updated again (OEM for RS6?)