Flywheels

Engineered in-house, our torque plate is designed to provide a robust and uniform clamping surface between the flywheel and crankshaft across a range of BMW engine applications. Compatible with both factory and Turner performance flywheels, it helps prevent surface galling and ensures consistent torque distribution during installation.

Features:

Prevents galling and wear at the crankshaft-to-flywheel interface under high clamping loads
Promotes even load distribution for improved fastener integrity and long-term reliability
Compatible with a variety of BMW flywheel setups, including OEM and aftermarket configurations
Design:

Precision-machined from cold rolled steel for high strength and dimensional accuracy
Heat treated to 32 HRC for increased surface hardness and wear resistance
Clear zinc anodized for enhanced corrosion protection
Laser-etched Turner logo
Ideal for performance builds and drivetrain refreshes, this torque plate is a critical component for maintaining proper flywheel installation and maximizing long-term durability across multiple BMW platforms.

The factory BMW S55 dual-mass flywheel is engineered with comfort in mind, catering to the luxury-oriented expectations of the brand’s driving experience. Its design focuses on dampening drivetrain vibrations, smoothing out gear transitions, and minimizing harshness during operation. However, this refinement costs valuable performance. The dual-mass flywheel adds a substantial 26.5 lbs of rotational mass to the drivetrain, which significantly hinders throttle response and makes rev-matching feel sluggish and disconnected. Moreover, dual-mass flywheels are notorious for being a weak link in modified or high-performance builds and can prove costly to replace when they inevitably fail.

Our Single-Mass Lightweight Flywheel Conversion addresses all of these shortcomings with a purpose-built, lightweight, single-mass design that prioritizes performance. Weighing in at only 18.5 lbs., this design significantly reduces rotational mass, allowing your S55 to achieve its true motorsport potential!

Features & Benefits:

Precision machined from 4140 HT heat-treated chromoly steel for exceptional toughness, even wear properties, and increased durability.
Material quality promotes even wear across the entire friction surface, prolonging component lifespan.
Heat treated to HRC 28-32, tempered to relieve stress and improve dimensional stability.
Hardness improves component wear characteristics.
Black oxide coated for corrosion resistance on non-friction surfaces.
Precision balanced to exceed OEM specification (G16 spec to 175g-mm).
SFI 1.1 certified to ensure safe operation under extreme operating conditions.
Specifically designed to work with S55 OE-architecture clutches.
Optimized step height maximizes clutch clamp load and offers a prolonged service life.
Performance:

10 lbs. lighter than the factory BMW flywheel!
OEM Dual-Mass: 26.5 lbs.
Turner Motorsport Single-Mass: 18.5 lbs.
Faster revs
Improved throttle response and acceleration
Allows for a more engaging driving experience and delivers a feeling of direct connection
Installation:

Flywheel Hardware: For added peace of mind, apply Blue or Orange Loctite when installing factory flywheel bolts that do not come with pre-applied threadlocker.

Lightweight flywheel for quicker, effortless revs that improve throttle response and free up lost horsepower. Tested and approved by our engineering team at Turner Motorsport. Tested in early, late, ETA and IS model E30s for confirmed fitment.

Introducing our Turner Flywheel: an ingenious blend of lightweight design, rich features, and remarkable strength! Crafted from 4140 HT Steel, this flywheel is precision-machined from a solid piece, ensuring unmatched durability. By strategically trimming excess weight from its original design, we've achieved a significant reduction in weight, giving new life to your M20 engine. With upgraded efficiency, your M20 can now swiftly spin to high RPMs, unleashing the full power and prowess of this formidable engine. Our flywheel features a ring gear profile compatible with all starters, alongside a reference tab tailored for early cars equipped with bellhousing-mounted sensor crank position detection.

Do you have an early model transmission with the crank sensors on the bellhousing? Maybe you have a late 325is with the crank sensor on the front of the engine, or maybe you have a 1988 super ETA. No matter which E30 model you have, our flywheel is the perfect choice for you.

During the engineering process we encountered the full spectrum of M20 and flywheel combinations. Early cars with bellhousing crank sensors, late cars with front mounting crank sensors and even a super ETA. On this adventure we found both early and late single mass flywheels and even the dual mass that we thought for sure was just a myth. At first we were hesitant that we could make one flywheel to fit them all but with the persistence of our engineering team(fleet of E30 enthusiasts) we can proudly say our M20 flywheel does in fact fit all engine and transmission applications you can think of.

Features and benefits:

Fits early and late models with M20
Fits shallow and deep bellhousing transmissions
Ring gear suited for both starters (P# 12411726504 + 12411361874)
Heavier than other lightweight flywheels, lighter than OEM, its like the Goldie Locks of flywheels - its just right
Reference pin for bellhousing crank sensor
Strong Single-Piece 4140 HT Steel construction
Designed to be used with factory and OE clutches
Weight Comparisons:

​Factory single mass flywheel EARLY (11221705046) - 23.69 lbs.
Factory single mass flywheel LATE (11221706573) - 18.74 lbs.
Dual mass flywheel (21211225979) - 27.56 lbs.
Turner flywheel - 14 lbs.
What you need:

Short bellhousing transmissions (I/IS) - Throw-out bearing P# 21517521471
Tall bellhousing transmission (ETA) - Throw-out bearing P# 21511204525

Turner Motorsport Lightweight N55 Flywheel & Upgraded Clutch Kit

Unlock the full potential of your N55-powered BMW with our performance-driven clutch and flywheel kit. Designed to enhance daily drivability while delivering increased power handling and improved throttle response, this kit is the ultimate upgrade for enthusiasts seeking more from their vehicle.

Why Choose This Kit?
This setup features the Turner Lightweight N55 Flywheel, precision-engineered for quicker acceleration, faster rev-matching, and a more responsive driving experience. Paired with an upgraded OE clutch from the high-performance 335is and F10 550i(V8 Bi-Turbo), this combo is capable of handling over 500 ft-lbs of torque while maintaining smooth, factory-like engagement and durability.

The factory dual-mass flywheel may prioritize smoothness and efficiency, but it comes at the cost of responsiveness and is prone to failure in high-performance applications. The Turner Lightweight Flywheel solves these issues with a single-mass design that strikes the perfect balance between comfort, performance, and reliability making it ideal for both daily driving and spirited track use.

Kit Contents:

Turner Lightweight N55 Single-Mass Flywheel (18.6 lbs, 10 lbs lighter than stock)
Upgraded OE Clutch – Supports 500 ft-lbs+
OE Clutch Fork - P# 21517564027
OE Throwout Bearing
Brass Clutch Fork Pivot Pin - P# 21511223328
OE Flywheel Bolts - P# 11227520706
OE Pressure Plate Screws - P# 21207548052
Pivot Pin Retaining Spring - P# 21517570284
Transmission Mating Dowels - P# 11117524470
Flywheel Features:

Precision-machined 4140 HT heat-treated chromoly steel for durability
Black oxide coating to resist corrosion
Precision balanced to exceed OEM standards
Optimized step height for longer clutch life and consistent performance
Clutch:

Upgrade for 135i/335i/535i models from the 335is! Featuring a heavy-duty clutch with more holding power and a stock-like pedal feel. Excellent solution for If your clutch is slipping, or the engagement isn't what it used to be, it's time for a replacement. Slipping clutches won't allow your BMW to accelerate properly and can pose problems under a load such as going up large inclines. Also, a worn clutch can cause less precise and engaging shifts. By replacing your clutch you will restore performance and driving pleasure.

This clutch is an excellent upgrade for non 335is/550i/650i models. It features a more heavy-duty clutch disc and more holding power with stock-like pedal effort.

Transform your driving experience with this Turner Motorsport clutch and flywheel kit - engineered for power, performance, and everyday reliability.

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) 

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)