Acura/Honda B18C engine chart. Reduce the current 54 mm flat plat
#28663 from Club Racing Board · Rule change · TB 20-04 (2020-04 Fastrack)
In STL, Mazda MZR Table A, change the restrictor size in the notes as follows:
"54 53mm"
BoP Lab / Rules / Letter #28663
#28663 Acura/Honda B18C engine chart. Reduce the current 54 mm flat plat
From Club Racing Board · STL · Rule change