Dump Valve Kompact Plumb Back – Mazda 3 MPS/6 MPS & Subaru

Dump Valve Turbosmart Kompact Plumb Back – Mazda 3 MPS / 6 MPS & Subaru

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 Plumb Back dump valve (BOV), a 100% recirculating version: all compressed air is returned to the intake. Quiet operation, with a sound level close to the original valve, ideal for those who want the benefits of a quality BOV without drawing attention.

Direct bolt-on replacement for the original plastic valve. Body machined from anodized billet aluminum with a lightweight precision piston: eliminates compressor surge, doesn't leak, and handles increased boost on a modified vehicle, where the original plastic valve cracks and leaks with age.

Compatibility:
- Mazda 3 MPS / 6 MPS / CX-7 2.3L MZR Turbo
- Subaru (WRX)

Turbosmart part number: TS-0203-1209.