What is the main benefit of an aluminum flywheel over a stock cast iron one?

An aluminum flywheel is significantly lighter than a stock cast iron unit. This reduction in rotational mass allows your engine to rev up and down more quickly, leading to improved acceleration and a more responsive feel.

Does this flywheel come with new bolts or hardware?

This SPEC aluminum flywheel is sold individually. It is recommended to inspect and replace flywheel bolts and clutch hardware as part of a clutch replacement job, referring to the manufacturer's installation instructions for details.

What is the material of the flywheel surface?

The flywheel surface is machined directly from the 6061-T6 aluminum billet. This provides a solid friction surface designed for optimal clutch disc engagement.

Specifications

Brand: SPEC
Part #: SB23A

Spec 94-99 BMW 323 2.5L/96-00 328 2.8L/89-95 525 2.5L/95-96 M3 3.0L Alum Flywheel

Name: Spec 94-99 BMW 323 2.5L/96-00 328 2.8L/89-95 525 2.5L/95-96 M3 3.0L Alum Flywheel
Brand: SPEC
SKU: spec-spec-94-99-bmw-323-2-5l-96-00-328-2-8l-89-95-525-2-5l-95-96-m3-3-0l-alum-fl-t14-304995
Price: 608.03 USD
Availability: BackOrder

$608.03

On Backorder

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Fits 1989-1995 BMW 525i. SPEC aluminum flywheel for improved acceleration and throttle response.

Key Features

Fits 1989-1995 BMW 525i, 1998-1999 BMW 323is, 1995-1999 BMW M3, 1997-2001 BMW Z3, and 1993 BMW 525iT.
Constructed from a solid billet of 6061-T6 aluminum for reduced weight.
Lightweight design improves engine acceleration and throttle response.
Machined surface ensures proper clutch disc contact for reliable engagement.
Designed as a direct replacement for the stock flywheel on compatible BMW models.
Well-built component for a responsive drivetrain feel.

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About this part

Product Details

This SPEC aluminum flywheel is machined from a solid billet of 6061-T6 aluminum, a strong yet lightweight material chosen for its ability to reduce rotational mass. For your 1989-1995 BMW 525i, this means a noticeable improvement in how quickly your engine revs up and down. It's a popular choice when rebuilding the drivetrain or upgrading the clutch system, especially for those looking for a more responsive feel from their vehicle.

The aluminum construction significantly cuts down on the weight compared to a stock cast iron flywheel. This reduction in rotational inertia allows your engine to accelerate more freely, making the car feel more eager off the line and during gear changes. The flywheel surface is designed for optimal clutch engagement, ensuring a solid connection between your engine and transmission. SPEC flywheels are known for their well-built construction, and this unit is no exception, offering a durable component for your BMW's drivetrain.

When installing this flywheel, remember that it's a critical component for clutch operation. Ensure you follow the manufacturer's recommended procedures for installation, including proper torque specifications for the flywheel bolts and clutch assembly. This SPEC aluminum flywheel is designed to be a direct fit for the specified BMW models, simplifying the installation process for a mechanic or a dedicated DIYer.