Sorry...hit the wrong button...
continued --
The 2004 specs cars can run the 2002 restrictor sizes
I assume that their bodywork revisions for front diffusers, etc. have to meet the new 2004 specs to run the bigger restrictors...
or
They can race a Homologated engine package that meets LM GT specs that can be up to 4.0 L in displacement but must be normally aspirated....no turbos allowed in the "Homologated" option...
Sorry for creating confusion with my earlier post...
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