Intake Manifold

[5150]

Ok im rebuilding my engine on my 95 GST, i am putting it back together and wanted to know sense i have a 1g intake manifold and a 2g, should i go ahead and use the 1g one? Or would it do anything without having the head ported to fit?

 

[Eclipsethis90]

Different Port sizes between the 1g and 2g intake manifolds, but as with anything...a little porting makes it all better. I am not exactly sure which flows more... but my if my memory serves me right the 1g flows more, but don't quote me on that. Do a search.

 

[LA97GST]

The 1G mani flows more than the 2G but the 1G mani ports are bigger than the 2G head ports. This causes a dam that make a big disturbance in the airflow. I think it would be better to use the 2g mani til you can get the head port matched to the 1G mani.

 

[Red97Eclipseboy]

Yes, the 1g intake mani is larger and does flow more; however, when it's put on a 2g head, it requires lots of porting to match. Most people say it's not a good idea. If I were you, I would just do a 1g throttle body swap. It will help with your mid-range power. Up to you.