GT2 Porsche 997.2 GT3 Cup EDIT
#40125 from Grand Touring Committee · Rule change · TB 26-05 (2026-05 Fastrack)
In GT2 Spec Lines, GT2 Cars - PORSCHE, 991.1 GT3 Cup, change Notes as follows:
"Modifications listed in Grand Am, IMSA Cup and World Challenge or any other rules, except those listed above, are specificallynot allowed are permitted. Factory (OEM manufacturer) Lexan front windows allowed as delivered. ABS is allowed."