This Blow off or Dump Valve valve has been developed for the Toyota Yaris GR Turbo engine which has an electronically controlled bypass valve (OE part no. 7.04654.08). It is recommended for any vehicle where the boost pressure has been increased by an ECU software update and for unmodified vehicles operating in hotter climates, as a solution to the many failures that have occurred. Unfortunately, the failure does not always cause the check engine light to come on, as the valve can still be opened by boost pressure, so you may not realise you are losing power. This prevents the diaphragm from sealing.

The Forge motorsport valve solution is available in either an atmospheric version, where a noise is heard when the foot is lifted from the throttle, or a factory-style noise-free recirculation version.

Fully designed to offer significantly improved reliability. The Forge valve is piston based, there is no diaphragm to fail, and of all-aluminium construction, it replaces the original unit with a pressure/vacuum actuated piston valve which also retains the OEM ECU's control over valve actuation.

In the box:

• 1 x FMDV34 valve
• 1 x 2.5m of 4mm vacuum tube
• 1 x 4mm brass T-piece
• 1 x 3 port solenoid and fixings
• 10 x Cable ties
• 1 x Red reinforced spring
• 1 x Wiring harness
• 1 x Instructions
• 1 x FORGE keyring and sticker

(comes with Yellow spring 23-30 PSI (pre-installed) and Red spring over 30 PSI)