Mazda MZR engine chart. Reduce the current 55 mm flat plate to 53
#28664 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:
"55 53mm"
BoP Lab / Rules / Letter #28664
#28664 Mazda MZR engine chart. Reduce the current 55 mm flat plate to 53
From Club Racing Board · STL · Rule change