Reference Letter #29333 Proposed STU 13B Spec Line Changes
#30086 from Scott Peterson · Rule change · TB 21-02 (2021-02 Fastrack)
In STU, Spec Lines, Mazda 13B Street Port 2400 Min Weight, change Notes as follows:
"Allow any dual throttle body/bodies. Chokes must be located within 4” of the throttle butterfly. Auto-type 2bbl choke(s) with
any dual-Y manifold. Unrestricted"