GT2 Porsche 997.2 GT3 Cup
#39936 from Grand Touring Committee · Rule change · TB 26-04 (2026-04 Fastrack)
In GT2 Cars - PORSCHE, 997.2 GT3 Cup, change Notes as follows:
"3.8L flat six. 2800 lbs. Aftermarket header allowed. Cars must be prepared in accordance with the appropriate model/year
Porsche factory 911 GT3 Cup parts catalog/service manual. Cars may not be altered in any way except as authorized below.
Drivers must have the correct year manuals as they apply to their specific car in their possession. Safety, drivers comfort, driver
control and instrumentation items may be modified per the GCR. Original factory installed Matter/IMV roll cages are allowed.
The stock unmodified fuel tank is allowed. Windshield clips must be installed per GCR 9.3 Windshield Clips/Rear Window Straps.
All other SCCA safety standards apply. The following additional modifications are authorized: Alternate hood provided it is a
facsimile of the stock part. Any wheel, including 5 bolt (and the required 5 bolt modification to the hubs). Tires per GCR 9.3 Tires.
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Battery size and location is unrestricted. Shocks are unrestricted but they shall be installed in the stock locations with the stock,
unmodified pick up points. Any suspension settings are allowed provided they are achieved without modifications. Machining of
suspension components and pick up points to achieve caster/camber/toe is not allowed. Lubricants, consumable fluids (brake
fluid, coolant etc.) and oil filters are open free. Modifications listed in Grand Am, IMSA Cup, World Challenge may be used. orany other rules, except those listed above, are specifically not allowed. Factory (OEM manufacturer) Lexan front windowsallowed as delivered. ABS is allowed."