Was looking on your site at the manifold insulators and was wondering what's the difference from VS/VT to VX/VY insulators?
Posted by on 26 May 2018 11:09 AM
The main difference between the two is the PCV valve port/channel. As a resultif you attempt to install a VS/VT manifold insulator on VX/VY Ecotec manifold, you'll end up with a massive vacuum leak. 

Howeveryou can install a VX/VY manifold insulator on a VS/VX Ecotec manifold, though installing it on a VS would require a section of the insulator to be trimmed to make room for the billet fuel rail on the passenger side

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