What is the primary benefit of the alternate hub on the clutch disc?

The alternate hub on the clutch disc is designed to absorb more shock and vibration. This is particularly beneficial in high-performance applications where increased horsepower and torque can put extra stress on the drivetrain, leading to a smoother engagement and longer component life.

What kind of driving is this clutch kit best suited for?

This Stage 2+ clutch kit is best suited for drivers who have significantly modified their 2005-2008 Porsche 911 997.1 S or C4S with performance upgrades. It's ideal for spirited street driving, track days, and situations where the vehicle is producing more power than stock.

Does this clutch kit include all necessary installation hardware?

This kit includes the clutch disc and pressure plate. It is recommended to consult the manufacturer's installation guide to determine if any additional hardware, such as a pilot bearing or alignment tool, is required for installation, as these are often sold separately.

Specifications

Brand: SPEC
Part #: SP903HS-3-842

Spec 05-08 Porsche 911 997.1 S / C4S Stage 2+ Clutch Kit w/ Alternate Hub

Name: Spec 05-08 Porsche 911 997.1 S / C4S Stage 2+ Clutch Kit w/ Alternate Hub
Brand: SPEC
SKU: spec-spec-05-08-porsche-911-997-1-s-c4s-stage-2-clutch-kit-w-alternate-hub-t14-491845
Price: 1133.10 USD
Availability: BackOrder

$1133.10

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Key Features

Fits 2005-2008 Porsche 911 997.1 S and C4S models.
Stage 2+ performance level designed for modified vehicles.
Includes a sprung clutch disc with an alternate hub for improved vibration damping.
Pressure plate offers increased clamping force to handle higher torque loads.
Well-built components for reliable power transfer under aggressive use.

This clutch kit is specifically designed for the 2005-2008 Porsche 911 997.1 S and C4S models. Always confirm fitment with your vehicle's specific configuration.

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About this part

Product Details

If you're looking to significantly increase the power handling capability of your 2005-2008 Porsche 911 997.1 S or C4S, this Stage 2+ clutch kit from SPEC is designed to handle the demands of a modified drivetrain. This kit is built to manage higher torque loads than the factory clutch, making it a solid choice for builds that have seen performance upgrades to the engine and exhaust systems.

This Stage 2+ kit features a high-performance sprung clutch disc with an alternate hub, which is crucial for absorbing shock and vibration, especially when dealing with increased horsepower and torque. The disc material is chosen for its durability and ability to provide a strong, consistent engagement. The pressure plate in this kit is engineered to offer a higher clamping force than stock, ensuring that the clutch can effectively transfer power without slipping under aggressive driving conditions or during spirited track use. SPEC is known for producing well-built clutch components, and this kit reflects their commitment to performance and reliability for demanding applications.

When installing this clutch kit, it's important to have all the necessary supporting components ready, as this is a significant upgrade from the original equipment. Always refer to the manufacturer's installation instructions for the most accurate procedures and torque specifications. This kit is a substantial upgrade for 997.1 S and C4S models that are pushing beyond stock power levels.