Win this M240i!
Every $50 spent = 1 entry*

No purchase necessary to enter or win. See official rules.

Win this M240i!
Every $50 spent = 1 entry*

No purchase necessary to enter or win. See official rules.

Performance Lightweight Flywheel Kit

A single mass flywheel engineered to handle more power, offering a 38% reduction in weight!
Mfg Part #
ECS Part #
$1344.95 (Sale - Save 15%)
Free Shipping Free Shipping
Availability: Inventory On Order, ETA Oct 27, 2021
Auto Notify
Does this fit my vehicle?

Product Details

Introducing the ECS Tuning Single Mass Lightweight Flywheel, engineered in the U.S. by our leading R&D team for increased power transfer, faster revs, and improved acceleration. A decreased mass means a lower moment of inertia and, weighing in at only 18.3lbs, the ECS Single Mass Flywheel spins up faster and easier than the heavy 29.8lb unit installed from the factory. That's 11.5lbs of weight savings!

Light doesn't mean wimpy. Our precision CNC machined single mass flywheel is amazingly strong, durable, and resilient to failure when compared to the OEM multi piece moveable unit. Designed to accommodate all conditions: from Sunday drives through the country, to the abuse of the track. 

Key Features:

  • Billet Chromoly 4140 steel & 6061-T6 aluminum for superior strength and durability
    • Heat treated for wear resistance
    • Black zinc plated for corrosion resistance
  • Weighs in at only 18.3lbs!
    • 11.5lbs lighter than stock!
  • SFI 1.1 tested and certified to ensure safe operation*
  • Performance Benefits
    • Faster revs
    • Improved throttle response
    • Smooth and easy stock-like engagement
    • Improved acceleration
    • Sportier driving experience
  • Allows you to utilize any clutch kit compatible with the B8 S4/S5 OEM flywheel 

The ECS Tuning Performance Lightweight Flywheel is designed for use with B8 3.0T / 4.2L pressure plates and clutch discs for an OE-type fit and is precision balanced to provide a smooth running and idle quality. Stronger and tougher than the original, if performance is job one on your to-do list ECS Tuning flywheel kits deliver.

Kit includes:

  • ECS Single Mass Lightweight Flywheel
  • Clutch Alignment Tool
  • Pilot Bearing
  • Flywheel Securing Hardware
  • Replacement Driveshaft Boot Clamp (required for vehicles with a splined driveshaft)

This kit does not include a clutch kit, allowing you to choose a clutch option that best suits your needs, and is designed to work with 240mm B8 3.0T / 4.2L clutch options only.

For help with installation, click on the Installation tab above for detailed instructions. 

*Why is SFI testing and certification important?

The SFI Foundation, Inc. (SFI) is a non-profit organization established to issue and administer standards for the quality assurance of specialty performance and racing equipment. SFI certification indicates a flywheel has been certified using industry-standard SFI Spec 1.1 standards by an independent testing body to ensure quality of both design and materials for flywheels utilized in competitive motorsports. This testing requires that the flywheel must hold at 10,500RPM over an extended period of time for validation of durability, design, and construction. 

Having successfully passed SFI certification, this flywheel has an individual SFI serial number found in a laser etching, and on an affixed sticker. This certification means our ECS-engineered flywheel is safe and reliable during the rigors of competitive racing; it's also safe and reliable for years and years of street use. 


**On our development vehicle equipped with a poly ECS Transmission Mount insert, slight audible chatter was noticed. Accompanying modifications can also increase or decrease the amount of "NVH" or "chatter" in the drivetrain. Please contact our sales team with any questions.**   

This Part Fits the Following Vehicles

Make Model Submodel Engine
Audi B8 S4 Quattro 3.0T
Audi B8 S5 Quattro 3.0T Cabriolet
Audi B8 S5 Quattro 3.0T Coupe
Audi B8 S5 Quattro V8 4.2L
*The above product applications have been written by ECS Tuning. All warranties, product application, fitment, and performance are the responsibility of ECS Tuning. For additional information see the terms of use.

Kit Contents

Description Brand Qty
Flywheel Bolt - Priced Each Genuine Volkswagen Audi - Corporate Logo 10
Pilot bearing Genuine Volkswagen Audi - Corporate Logo 1
Bolt (M8x14) - Priced Each Genuine Volkswagen Audi - Corporate Logo 6
Flywheel Bolt - Priced Each Genuine Volkswagen Audi - Corporate Logo 6
driveshaft boot clamp Genuine Volkswagen Audi - Corporate Logo 1
SFI Special Care - Note Pack List And Order With SFI Serial Number
B8 S4 Lightweight Flywheel ECS - Corporate Logo 1
Viton O-Ring - Priced Each ECS - Corporate Logo 1
Clutch Alignment Tool South Bend Clutch - Corporate Logo 1


ECS Tuning is not affiliated with any automobile manufacturers.
Manufacturer names and/or part numbers are used only for identification purposes.

Terms of Use Privacy Policy ECS Tuning is part of Enthusiast Auto Holdings