Designed as a direct replacement for the OEM valve which is prone to failure when the engine has been tuned or had an upgrade to the engine management software. This valve is complete and ready to install with no fitting kit required.
This valve is supplied assembled with our "green" coded spring which is suitable for standard or mildly tuned engines, and also comes with an uprated 'yellow' coded spring. 
 
This valve is suitable for:
Vauxhall/Opel Astra G or H type Z20LET Engine
Astra VXR J Type
Astra 1.6 GTC
Corsa VXR 1.6 Turbo Z16LER Engine
Vauxhall Zafira A or B with Z20LET Engine
Bentley Continental GT 2003-11
 
 
Kit includes:
1 x FMDVK04D Valve
1 x Uprated Yellow Spring
1 x Forge Sticker