I dont quite understand this either or see what it will achieve.
"
It is permitted to use the OEM intake and throttle body for either the chassis or the installed

engine."

Take a 240sx for example. The ONLY way to run this car in STL would be with a SR20 swap. The intake manifold needed to do this would come from a JDM engine and chassis that is not allowed.
Should we not just allow the use of non USDM intake manifolds?
If we dont find a way to "un-Honda domination" the STL rules, the class WILL fail.