01 / Specifications

Engineered, not estimated.

Every number on this sheet was measured against the OEM body and published.

MaterialT304 stainless + Ti valve
ValvesDual vacuum-actuated
Sound (closed)76 dB
Sound (open)108 dB
ControlECU / remote / app
Diameter3" twin exit
CompatibilityWRX VB
OriginUSA hand-welded
02 / Why it's different

Two cars in one.

Valves closed: 76 dB at idle — quieter than OEM. Valves open: 108 dB on track — louder than any non-valved aftermarket on the platform. ECU-tied to drive mode by default, app-overridable.

03 / Install

DIY-ready in three steps.

Every order ships with hardware, instructions, and a link to the AFD installation video.

Watch the install video →
  1. 01

    Unbox & inspect

    Every part QC-checked and serial-tagged before it ships. Verify fitment against the OEM body before drilling anything.

  2. 02

    Dry-fit & align

    Tape the part in place, walk around the car, eyeball the panel gap. Adjust before committing the adhesive.

  3. 03

    Bolt down & cure

    Torque to spec sheet, peel the VHB liner, press for 30 seconds per zone.