Flywheels

Lightweight flywheels have proven themselves to be a worthwhile performance enhancement. But with the quicker throttle response and horsepower improvement comes one serious drawback: flywheel chatter. Without the dual-mass flywheel's rubber isolators, a lightweight aluminum flywheel has more rattle than stock. ECS has designed this flywheel using chrom-moly steel and it weighs almost ten pounds less than the stock DMF but not as extreme as full aluminum flywheels. The steel helps dampen vibration and noise so you get near-factory refinement and most of the benefits of a lightweight flywheel: quicker throttle response, better reliability, and more power to the wheels. Zero-balanced and SFI 1.1 certified (material and design has been independently burst tested to ensure quality and safety). This flywheel requires the E34 M5 sprung hub clutch kit. Choose below from the flywheel only or a complete kit.

Modern flywheels are built with additional components that are designed to dampen and minimize vibrations from the engine and transmission. Weight has increased and reliability has decreased. With additional weight more energy is required for it to move. A lightweight flywheel does away with the dual mass design and its additional mass so more energy can be diverted to where it counts most - moving the car. The flywheel and clutch is one of the first areas that engine builders address when making the rotating assembly lighter for race engines. The dampening effect is just not needed on cars that are focused on performance. And with a single-mass flywheel the unreliable DMF design is eliminated.

Stock flywheel weight - 25.0lbs
ECS flywheel weight = 16.55lbs

This item fits the following BMWs:
1992-1999 E36 BMW 323is 323ic 325i 325is 325ic 328i 328is 328ic M3
1999-2002 E46 BMW 323i 323ci 325i 325ci 328i 328ci 330i 330ci (5-speed)
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i Z3 2.8 Z3 3.0i M Roadster M Coupe
2003-2005 E85 BMW Z4 2.5i Z4 3.0i (5-speed) 

BMW E46 E39 Z3 Z4 Lightweight Steel Flywheel is an exceptional performance upgrade designed to enhance your driving experience by providing quicker revs and reducing turbo lag. Engineered by Turner Motorsport, this flywheel is constructed from high-quality 6061-T6 billet aluminum with a high-carbon steel replaceable friction surface, ensuring durability and improved acceleration.

• Increased Acceleration: Reduced mass results in quicker engine revs and enhanced acceleration.
• High-Quality Materials: Made from 6061-T6 aircraft-grade billet aluminum for exceptional strength and performance.
• Durable Construction: Features a high-carbon steel replaceable friction surface and an OE steel ring gear secured by bolts.
• Lifetime Warranty: Comes with a limited lifetime warranty, underscoring its reliability and long-term performance.
• SFI Certification: Meets SFI Spec 1.1 or 1.2 standards, ensuring high-quality construction and safety.

This lightweight flywheel fits the following BMW models:

• 1999-2002 E46 BMW 323i, 323ci, 325i, 325ci, 328i, 328ci, 330i, 330ci (with 5-speed manual transmission)
• 2001-2005 E46 BMW 325xi, 330xi
• 1997-2002 Z3 BMW Z3 2.3, Z3 2.5i, Z3 2.8, Z3 3.0i

The factory dual-mass flywheel in your MINI N14 was built with comfort in mind—absorbing drivetrain vibrations and smoothing shifts—but at the cost of performance. Weighing in at a hefty 28.3 lbs., the OEM flywheel adds excessive rotational mass, dulling throttle response, slowing acceleration, and complicating precise rev-matching. Worse yet, it's known to be unreliable in modified or tuned setups and expensive to replace when it fails.

This single-mass design from ECS Tuning weighs just 18.8 lbs. It cuts nearly 10 lbs. of rotational weight to significantly enhance throttle response, acceleration, and overall driving feel. Built for durability and spirited driving, it's the ultimate upgrade for enthusiasts who want to make the most of every gear change.

Key Features:

Precision CNC-machined from 4140 HT Chromoly Steel: Ensures outstanding toughness, consistent wear, and long-term durability.

Heat Treated and Tempered: Achieves HRC 28-32 for improved strength, stress relief, and dimensional stability—even at elevated temperatures.

Black Oxide Coated: Resists corrosion for long-lasting protection and a professional finish.

Precision Balanced: Exceeds OEM standards (G16, 175 g-mm) to ensure smooth, safe operation at all RPMs.

SFI 1.1 Certified: Tested and approved for extreme use—track or street.

Direct Fit for OE N14 Clutch Kits: Maintains compatibility with factory-style components for hassle-free installation.

Performance Benefits:

Substantial Weight Reduction

​OEM Flywheel: 28.3 lbs.

ECS Lightweight Flywheel: 18.8 lbs.

Net Savings: Nearly 10 lbs.

Faster Revving and Sharper Throttle Response: Reducing rotational mass translates into a more dynamic and responsive driving experience.

Improved Clutch Engagement and Longevity: Optimized step height delivers better clamp load and extends service life.

Ideal for Modified MINIs: Built to handle increased power and spirited driving with confidence.

Replaces MINI OEM Part #: 21207575069

An excellent performance upgrade so you can enjoy quicker revs and eliminate excess turbo lag. Made of high quality 6061-T6 billet aluminum, with a high-carbon steel replaceable friction surface, this flywheel from Clutch Masters is sure to be a great upgrade for anyone looking to reduce crankshaft drag and increase acceleration.

Typical benefits of a Clutch Masters lightweight flywheel:

• Reduced mass equals increased acceleration
• CM uses only 6061-T6 aircraft grade or better billet aluminum in the manufacturer of its flywheels
• CM uses an OE steel ring gear secured by bolts
• CM offers a limited lifetime warranty
• CM Billet Aluminum Flywheels meet SFI Spec 1.1 or 1.2

An excellent performance upgrade so you can enjoy quicker revs and eliminate excess turbo lag. Made of high quality 6061-T6 billet aluminum, with a high-carbon steel replaceable friction surface, this flywheel from Clutch Masters is sure to be a great upgrade for anyone looking to reduce crankshaft drag and increase acceleration.

Typical benefits of a Clutch Masters lightweight flywheel:

• Reduced mass equals increased acceleration
• CM uses only 6061-T6 aircraft grade or better billet aluminum in the manufacturer of its flywheels
• CM uses an OE steel ring gear secured by bolts
• CM offers a limited lifetime warranty
• CM Billet Aluminum Flywheels meet SFI Spec 1.1 or 1.2

An excellent performance upgrade so you can enjoy quicker revs and eliminate excess turbo lag. Made of high quality 6061-T6 billet aluminum, with a high-carbon steel replaceable friction surface, this flywheel from Clutch Masters is sure to be a great upgrade for anyone looking to reduce crankshaft drag and increase acceleration.

Typical benefits of a Clutch Masters lightweight flywheel:

• Reduced mass equals increased acceleration
• CM uses only 6061-T6 aircraft grade or better billet aluminum in the manufacturer of its flywheels
• CM uses an OE steel ring gear secured by bolts
• CM offers a limited lifetime warranty
• CM Billet Aluminum Flywheels meet SFI Spec 1.1 or 1.2

The factory dual-mass flywheel in W11-powered MINI Coopers was designed with comfort in mind—minimizing drivetrain vibration and delivering smoother shifts. However, this focus on refinement comes at a performance cost. The hefty 27 lbs. of rotational mass dulls throttle response, slows acceleration, and makes rev-matching more difficult. Dual-mass flywheels are also known to be less reliable in tuned or modified setups and can be expensive to replace when they fail.

ECS Tuning developed their Lightweight Single-Mass Flywheel to address these issues with a performance-focused alternative. Weighing in at just 17 lbs., this flywheel sheds nearly 10 lbs. of rotating mass compared to the OEM unit—transforming throttle response, acceleration, and clutch feel for a more engaging and dynamic driving experience.

Key Features:

Manufactured from 4140 Chromoly Steel
Heat-treated and tempered for exceptional strength, wear resistance, and thermal stability.
Optimized Hardness (HRC 28–32)
Ensures consistent performance and durability under extreme conditions.
Precision-Balanced to G16 Standard (175 g-mm)
Exceeds OEM balance requirements for smooth, high-RPM operation.
Black Oxide Finish
Provides effective corrosion resistance and a sleek appearance.
SFI 1.1 Certified
Validated for safe use in high-performance and racing environments.
Direct Fit
Engineered to work seamlessly with OE-style clutch kits designed for the W11 engine architecture.
Performance Benefits:

OEM Flywheel Weight: 27 lbs
ECS Lightweight Flywheel Weight: 17 lbs
This significant weight reduction results in:

Sharper throttle response
Faster engine revs and acceleration
Improved clutch engagement and feel
Increased performance potential for modified vehicles
OEM & Aftermarket Compatibility:

Replaces OE Flywheel #: 21207532057
Compatible Clutch Kits:
MINI OE: 21207551384
Spec: SB001, SB003
Clutch Masters: 03050HD00R
Recommended Hardware:

Flywheel Bolts: 11227560579 (Qty 8)
Pressure Plate Bolts: 21207520449 (Qty 6)

Elevate your BMW MINI Cooper S/JCW 2.0L's performance with this lightweight clutch master flywheel, weighing just 25 lbs. Crafted to reduce rotational mass, this flywheel upgrade significantly enhances engine response and acceleration, providing an amplified driving experience.

• Lightweight design for reduced rotational mass
• Improves engine response and acceleration
• Enhances overall driving performance

An excellent performance upgrade so you can enjoy quicker revs and eliminate excess turbo lag. Made of high quality 6061-T6 billet aluminum, with a high-carbon steel replaceable friction surface, this flywheel from Clutch Masters is sure to be a great upgrade for anyone looking to reduce crankshaft drag and increase acceleration.

Typical benefits of a Clutch Masters lightweight flywheel:

• Reduced mass equals increased acceleration
• CM uses only 6061-T6 aircraft grade or better billet aluminum in the manufacturer of its flywheels
• CM uses an OE steel ring gear secured by bolts
• CM offers a limited lifetime warranty
• CM Billet Aluminum Flywheels meet SFI Spec 1.1 or 1.2

For vehicles with production date up to 01/2009 

Put an end to annoying clutch chatter with this brand-new dual mass flywheel. When you install this system, you'll experience a significant reduction in the effort required when shifting gears.

It's important to note that these dual mass flywheels cannot be resurfaced. If any wear is detected during a clutch replacement, they should be replaced. This flywheel comes in a 228mm diameter, offering a whole new shifting experience for your car.

Upgrade your clutch system and enjoy smoother gear changes with this dual mass flywheel.

An excellent performance upgrade so you can enjoy quicker revs and eliminate excess turbo lag. Made of high quality 6061-T6 billet aluminum, with a high-carbon steel replaceable friction surface, this flywheel from Clutch Masters is sure to be a great upgrade for anyone looking to reduce crankshaft drag and increase acceleration.

Typical benefits of a Clutch Masters lightweight flywheel:

• Reduced mass equals increased acceleration
• CM uses only 6061-T6 aircraft grade or better billet aluminum in the manufacturer of its flywheels
• CM uses an OE steel ring gear secured by bolts
• CM offers a limited lifetime warranty
• CM Billet Aluminum Flywheels meet SFI Spec 1.1 or 1.2