Quote Originally Posted by Greg Amy View Post

Edit: "...does rear most body work include bumper? Actually, I'd say "no". The intent of the rule is to clarify the characteristics of a hatchback (letting you put the wing higher, thus out of the turbulence of the roof). So IMO -- and I wrote the rule, but please read my sig -- that measurement does NOT include the rear bumper cover.
Disagree. Body is separate from chassis. just as a fender and door is part of the bodywork, so is a trunklid, front bumper or rear bumper.

Splitter rules for ST I believe refernce limiting forward protrusion as refernced by the bodywork - which would be the front bumper, not the hood or unit body underpinnings.