Plastic manifold

[SBellew]

Intake manifold

Has anyone ever tried one of these plastic intake manifolds or have any knowledge if they are an improvement or benefits v. cons.

https://www.summitracing.com/parts/rnb-615-181

 

[lesterl]

This is just the upper intake manifold, a stockish replacement (this is what comes on the Vortecs....)