Dump Valve Kompact Dual Port – Subaru

Dump Valve Turbosmart Kompact Dual Port – Subaru WRX 2002-2007 / STI 2004-2021 / Forester XT

Turbosmart is a leading Australian manufacturer specializing in turbo engine tuning, active since 1997 under the motto "Engineered to Win." A long-standing specialist in dump valves (blow-off valves), the brand designs, machines, and tests its products in-house to guarantee reliability, sealing, and performance.

The Kompact range is Turbosmart's entry point into the world of dump valves (BOVs): it targets stock or lightly modified vehicles used on the road, for power outputs up to around 400 hp. It directly replaces the original plastic valve with a body machined from anodized billet aluminum and a lightweight precision piston, which eliminate compressor surge and the boost leaks typical of aging OEM valves. Available in Dual Port (atmospheric sound + recirculation) or Plumb Back (fully recirculating, quiet, MAF-compatible) versions, with interchangeable springs to adjust opening pressure. It is the best-selling range in its category worldwide: a reliable, robust, and very affordable replacement, while the BOV5 and RacePort ranges target more intensive use (track, high power).

Turbosmart Kompact Dual Port dump valve (BOV) as a direct replacement for the Subaru WRX/STI's original valve. Machined from anodized billet aluminum with a lightweight precision piston: where the original plastic valve becomes brittle, cracks with age and leaks boost pressure, the Kompact eliminates compressor surge and holds boost, even when increased.

Dual Port configuration: 50/50 split between recirculation to the intake and venting to atmosphere. The sequential port operation ensures discreet driving at low boost (ECU kept happy) while delivering the sound and performance of an atmospheric vent as soon as pressure rises. Internal piston with adjustable preload (interchangeable springs).

Ideal for a stock or lightly modified vehicle seeking the characteristic sound of an atmospheric BOV in a compact, OEM-style format.

Compatibility:
- Subaru WRX (2002-2007)
- Subaru STI (2004-2021)
- Subaru Forester XT (2006-2008)

Turbosmart part number: TS-0203-1015.