Turbosmart TS-0203-1209 Kompact Plumb Back BOV for 2005-13 Mazda MPS/Turbo

Vehicle Fitment

• 2005-2007 Mazda Mazdaspeed6 (2.3L Turbo)
• 2007-2009 Mazda Mazdaspeed3 (BK, 2.3L MZR Turbo)
• 2010-2013 Mazda Mazdaspeed3 (BL, 2.3L MZR Turbo; requires aftermarket airbox for some setups)
• 2007-2012 Mazda CX-7 Turbo (2.3L L3-VDT)
• Fitment based on compatible Bosch/Denso valve interchange and plumb-back design; verify fitment on specific car/charge piping before installation

Features

• Plumb Back (full recirculating) blow-off valve design vents all boost back into intake for stealth performance
• Constructed from precision billet aluminium body for strength and durability over factory plastic valves
• Improved turbo response and reduced boost leakage compared to stock bypass valves
• Fitment to common Bosch/ Denso type ports found on many turbo cars, especially Mazda MPS platforms
• Suits engines up to approximately 400 HP when properly installed
• Compact Kompact design for tight engine bay locations and ease of installation
• Supplied with gasket and factory-rated green spring installed
• Plumb back design eliminates vent-to-atmosphere noise for a quiet, factory-style operation

Specifications

• Brand: Turbosmart
• Part Number: TS-0203-1209
• Valve Type: Kompact Series Plumb Back Blow-Off Valve
• Material: Billet aluminium body
• Finish: Black anodised
• Operation: Full recirculation - no vent-to-atmosphere
• Spring Installed: Green (-15 InHg) for balanced operation
• Fitment: Mazda speed models and compatible turbo applications (verify before installment)
• Legal: Off-road/race use in some regions - verify emissions compliance locally

Included Components

• 1x Turbosmart Kompact Plumb Back Blow-Off Valve (TS-0203-1209)
• 1x Gasket for sealing to charge pipe
• Installed green spring (-15 InHg)
• Basic fitting instructions

Product Description

The Turbosmart TS-0203-1209 Kompact Plumb Back Blow-Off Valve is a recirculating turbo relieve valve designed to replace weaker factory bypass valves commonly found on turbocharged Mazda performance cars, including the Mazdaspeed3 (both BK and BL generations), Mazdaspeed6, and CX-7 models equipped with the 2.3 L turbo engine. With a full plumb back design, this valve recirculates all excess boost air back into the intake system rather than venting to atmosphere, helping maintain ECU compatibility and delivering a stealthier performance without the loud vent-to-atmo sound.

Constructed from high-quality billet aluminium with a compact body that fits tight engine bays, the TS-0203-1209 offers improved structural integrity and durability compared to stock plastic units. It's ideal for enthusiasts looking for reliable boost control and throttle response without dramatic noise changes. The plumb back configuration ensures smooth operation and retains performance characteristics across varied boost conditions, while the supplied green spring and gasket make installation straightforward. Before fitting, verify that your vehicle's bypass valve type matches Bosch or Denso style interfaces used on many Mazda turbo vehicles.