Alternate OEM Miata Intake Manifold
#33827 from Brandon Steinhauer · Rule change · TB 23-04 (2023-04 Fastrack)
In STU Spec lines, classify Mazda BP5A as follows:
STU Maximum Displacement (cc's) Minimum Weight Notes
Mazda BP5A 1839 Chart May use engine in its entirety or specific
components from the engine.