Spec 81-86 BMW 323 (M20) / 86-93 BMW 325 (E30) / 89-90 BMW 525 Aluminum Flywheel

SPEC is known for making well-built performance clutch components, and this aluminum flywheel is a prime example of their work for BMW E30 and E34 chassis cars. If you're looking to shed some weight and get a quicker response from your M20 engine, this flywheel is a solid choice. It's designed to replace the factory dual-mass flywheel, offering a significant reduction in rotational mass.

This flywheel is constructed from aircraft-grade aluminum, which is much lighter than the stock steel unit. This weight reduction means your engine can rev up and down more freely, leading to improved acceleration and a more responsive feel when you get on the gas or lift off. It's a popular upgrade for anyone rebuilding their drivetrain or looking to get more performance out of their 323, 325, or 525 BMW. The SB29A is designed to work with most factory and aftermarket clutch kits for these specific models, making the swap straightforward.

When installing this flywheel, remember that it's a lighter, single-mass design compared to the stock dual-mass unit. This change can sometimes lead to a bit more gear noise at idle or when the clutch is disengaged, which is normal for this type of performance upgrade. You'll want to ensure your clutch disc and pressure plate are compatible with a single-mass flywheel setup. This part is a direct replacement for the factory flywheel on the specified BMW models, fitting right into place with the correct hardware.