GT3 4v SIR size increase.
#28931 from Grand Touring Committee · Rule change · TB 20-07 (2020-07 Fastrack)
In GT3, Spec Lines, 4v, 4 cylinder pistons engines with SIR, change Fuel Induction as follows:
ACURA
F20C: "31 32"
K20A: "31 32"
K24: "31 32"
AUDI
DOHC w/1984cc: "31 32"
BMW
Show 6 more lines
DOHC w/1895cc: "31 32"
DOHC w/2302cc: "31 32"
CHEVROLET
DOHC w/1998cc: "31 32"
CHRYLER/DODGE/PLYMOUTH
DOHC w/1997cc: "31 32"
A specification table follows in the original; it is not shown here.