GT2 Mazda 20B 3 rotor ENO
#34765 from Grand Touring Committee · Rule change · TB 23-09 (2023-09 Fastrack)
In GT2 Spec Lines, Engines - MAZDA, combine both 20B to one spec lines and keep the following:
Weight: "2500 2280"
Notes: "Must run +100 lbs. for Grand Am transaxle and independent rear suspension. Must comply with all other GT2 rules."