GSC Exhaust Camshaft Set for Porsche 996/997/991 GT3 Cup S – GSC6977EX
The GSC6977EX Exhaust Camshaft Set is a direct-fit replacement for the factory GT3 Cup S exhaust cams used in Porsche 996, 997, and 991 platforms. Designed to match OEM specs while supporting increased airflow, this set is ideal for 3.8L and 4.0L engine builds targeting higher output — especially in PCA GTA class applications.
Porsche OEM Part Reference
- Exhaust Camshaft: 996.105.245.92
Compatibility Notes
Works with OEM Cup dual valve springs when properly set up and verified for coil bind and seat pressure. Maintains factory reliability while supporting performance upgrades.
Ordering Options
- Full Set: Includes 2 intake cams and 2 exhaust cams
- Exhaust Set: Includes 2 exhaust cams only (GSC6977EX)
- Intake Set: Includes 2 intake cams only
Whether you're refreshing a Cup motor or building a high-flow track setup, the GSC6977EX exhaust cams deliver OEM fitment with performance-ready airflow characteristics.
Fitment:
- 2004 Porsche 996 GT3 Cup S
- 2005 Porsche 996 GT3 Cup S
- 2006 Porsche 997 GT3 Cup S
- 2007 Porsche 997 GT3 Cup S
- 2008 Porsche 997 GT3 Cup S
- 2009 Porsche 997 GT3 Cup S
- 2010 Porsche 997 GT3 Cup S
- 2011 Porsche 997 GT3 Cup S
- 2012 Porsche 997 GT3 Cup S
- 2013 Porsche 997 GT3 Cup S
- 2014 Porsche 991 GT3 Cup S
- 2015 Porsche 991 GT3 Cup S
- 2016 Porsche 991 GT3 Cup S
- 2017 Porsche 991 GT3 Cup S
- 2018 Porsche 991 GT3 Cup S
- 2019 Porsche 991 GT3 Cup S
- 2020 Porsche 991 GT3 Cup S
* Also suitable for standard GT3 Cup cars running 3.8L or 4.0L rebuilds where increased airflow is desired — especially in PCA GTA class setups.
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