GSC Power-Division Porsche 996/997/991 GT3 Cup S Camshaft set

GSC Power-Division Porsche 996/997/991 GT3 Cup S Camshaft set

Exhaust Set
$1,200.00
$1,200.00 $1,200.00
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GSC Power-Division Porsche 996/997/991 GT3 Cup S Camshaft set
GSC Power-Division Porsche 996/997/991 GT3 Cup S Camshaft set
SKU: GSC6977EX

GSC Power-Division Porsche 996/997/991 GT3 Cup S Camshaft set

Low stock: 4
$1,200.00
$1,200.00 $1,200.00

GSC Power-Division Porsche 996/997/991 GT3 Cup Camshaft set. Designed as a factory replacement for the GT3 Cup S camshafts.

Porsche part numbers
Exhaust: 996.105.245.92
Intake: 996.105.236.97

These can also be used in standard GT3 Cup cars with 3.8L or 4.0L engine rebuilds needing more air flow for increased power (PCA GTA class type cars). 

OEM Cup Dual springs ok to use when set up and checked for coil bind and seat pressure.

ORDER OPTIONS

"FULL SET"  CONSISTS OF 2 EXHAUST CAMS AND 2 INTAKE CAMS

"EXHAUST SET" IS ONLY A PAIR OF 2 EXHAUST CAMS

"INTAKE SET" IS ONLY A PAIR  OF 2 INTAKE CAMS

IMAGES ARE FOR ILLUSTRATION PURPOSES ONLY.

Camshafts

GSC Power-Division camshafts are engineered to maximize airflow, power production, and usable RPM while maintaining the valvetrain stability required for real-world performance. Unlike generic “one-size-fits-all” profiles, GSC camshafts are developed using application-specific analysis that considers cylinder head flow characteristics, valvetrain geometry, rocker motion, intended powerband, fuel type, and engine configuration.

Manufactured from forged barstock in house with precision-ground lobe profiles, GSC cams are trusted by engine builders, tuners, racers, and enthusiasts around the world — from street cars to record-setting drag programs. Whether the goal is improved response, broader power delivery, or extreme horsepower capability, GSC camshafts are built around one principle: maximizing performance without compromising valvetrain control.

Frequently Asked Questions

What makes GSC Power-Division camshafts different?

GSC Power-Division camshafts are engineered specifically for high-performance applications using proprietary lobe designs, premium billet materials, and advanced manufacturing processes. Every camshaft profile is developed to maximize airflow, power, durability, and valvetrain stability for its intended application.

How do I choose the correct camshaft for my application?

The best camshaft depends on your engine configuration, turbocharger size, intended RPM range, fuel type, cylinder head setup, and horsepower goals. If you’re unsure, contact our technical support team for recommendations.

Will aftermarket camshafts increase horsepower?

Yes. Properly matched camshafts can significantly improve airflow, power, torque, and RPM capability. Actual gains depend on the overall engine combination.

Do I need valve springs with aftermarket camshafts?

In many cases, yes. More aggressive camshaft profiles require upgraded valve springs to maintain valve control at higher RPMs and boost levels. Product pages will indicate whether upgraded springs are required.

Can I use GSC camshafts with OEM valve springs?

Some Stage 1 camshafts are compatible with OEM springs under certain conditions. Always verify spring requirements listed on the product page before installation.

Do I need a tune after installing camshafts?

Most performance camshaft installations benefit from ECU recalibration. A proper tune helps maximize power, drivability, and reliability.

Are your camshafts billet?

Yes. GSC performance camshafts are manufactured from premium forged billet cores for maximum strength and durability.

What is BLACK ISE?

BLACK ISE is GSC’s advanced surface treatment process designed to reduce friction and enhance durability in high-performance valvetrain environments.

GENERAL F.A.Q

Where are GSC products manufactured?

Many GSC products, including our camshafts, are designed, machined, and finished in-house at our facility in South Carolina, USA. We maintain strict quality control throughout the manufacturing process.

How long has GSC been in business?

GSC Power-Division has been serving the performance automotive industry for over 20 years, supplying racers, engine builders, tuners, and enthusiasts worldwide.

Do you sell directly to consumers?

Yes. We sell directly through our website and also through an extensive network of authorized dealers and distributors worldwide.

Does GSC cover engine damage?

GSC’s warranty covers defects in the product itself. Consequential damages, including engine damage, labor, towing, or vehicle downtime, are not covered.

Will racing void my warranty?

Products used in racing or competition environments are subject to conditions outlined in our warranty policy. Performance applications inherently involve risks beyond normal operating conditions.

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