What is the advantage of a sprung hub clutch disc?

A sprung hub clutch disc incorporates springs within the hub assembly. These springs help to dampen torsional vibrations and shock loads that occur during clutch engagement and disengagement, leading to a smoother feel and reducing stress on the drivetrain.

What kind of flywheel is required for this SPEC clutch kit?

This SPEC Stage 3 clutch kit, part number SB053S-889, is specifically designed to be used with an aftermarket billet flywheel. Using a different type of flywheel may result in improper function or damage to the clutch components.

How much torque can this clutch kit handle?

This clutch kit is rated to handle a substantial 889 ft-lbs of torque. This makes it suitable for significantly modified BMW engines that produce higher power output than stock.

Specifications

Brand: SPEC
Part #: SB053S-889

Spec BMW 328/525/M3 Stage 3 Sprung Clutch Kit 10 Spline FOR USE WITH AFTERMARKET BILLET FLYWHEEL

Name: Spec BMW 328/525/M3 Stage 3 Sprung Clutch Kit 10 Spline *FOR USE WITH AFTERMARKET BILLET FLYWHEEL*
Brand: SPEC
SKU: spec-spec-bmw-328-525-m3-stage-3-sprung-clutch-kit-10-spline-for-use-with-afterm-t14-459787
Price: 575.10 USD
Availability: BackOrder

$575.10

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Spec BMW 328/525/M3 Stage 3 Sprung Clutch Kit 10 Spline *FOR USE WITH AFTERMARKET BILLET FLYWHEEL*

Key Features

Fits BMW 328i, 525i, and M3 models.
Stage 3 performance clutch kit with a sprung hub design.
Rated for a high torque capacity of 889 ft-lbs.
Features a 10-spline input shaft for compatibility.
Designed for use with an aftermarket billet flywheel.
High-performance friction material for durability and consistent engagement.

This clutch kit is designed for specific BMW models including the 328i, 525i, and M3. It requires an aftermarket billet flywheel for proper installation and operation.

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About this part

Product Details

This SPEC Stage 3 clutch kit is built with a sprung hub design, which helps absorb some of the shock and vibration that can occur during engagement, making it a more comfortable option for spirited driving compared to a solid hub. It features a 10-spline input shaft and is rated to handle up to 889 ft-lbs of torque, making it a robust choice for modified BMWs that see frequent track use or aggressive street driving.

The clutch disc in this kit utilizes a high-performance friction material that balances holding power with drivability. This material is chosen for its ability to withstand higher temperatures generated during demanding use, ensuring consistent performance when you need it most. The sprung design of the hub is key here, as it allows the clutch to absorb torsional vibrations, reducing stress on the drivetrain components and providing a smoother engagement feel, especially important when dealing with the higher torque capacities this kit offers.

It's important to note that this clutch kit is specifically designed for use with an aftermarket billet flywheel. This is because the increased clamping force and torque capacity of this clutch require a flywheel that can handle the stresses involved and provide the proper mounting surface. Ensure you have a compatible billet flywheel before installation, as using the wrong type of flywheel can lead to premature wear or component failure. This kit is a solid option for BMW owners looking to significantly upgrade their clutch's holding power while maintaining a reasonable level of drivability for performance applications.