AdlerSpeed Lightweight Aluminum Flywheel — M50/M52/S50/S52/S54

Name: AdlerSpeed Lightweight Aluminum Flywheel — M50/M52/S50/S52/S54
Brand: AdlerSpeed
SKU: US/896101
Price: 128.69 USD
Availability: InStock

by AdlerSpeed

E85

$128.69

Get Deal on Amazon

Key Features

CNC-machined from 6061-T6 billet aluminum; weighs just 10.4 lbs
Meets SFI 1.1 specification — track-legal and street-ready
TIG-welded safety tab permanently locks ring gear against separation
Helicoil-reinforced bolt holes preserve thread integrity through repeated torque cycles
Coarse-ground friction surface maintains consistent clutch engagement coefficient
Stepped locating pins ensure precise plate alignment and balance on every install

Product Details

Brand: AdlerSpeed
Part #: US/896101
Category: Lightweight Flywheels
ASIN: B0FFGC2F6Z

Check if it fits your BMW

AdlerSpeed Lightweight Aluminum Flywheel — M50/M52/S50/S52/S54 — Overview

AdlerSpeed's aluminum flywheel for BMW's M50, M52, S50, S52, and S54 engines is built around a single piece of 6061-T6 billet aluminum, CNC-machined at a constant surface speed to achieve both dimensional precision and a consistent finish. At just 10.4 lbs, it represents a dramatic reduction over the factory cast-iron unit — less rotating mass means the engine spins up faster, throttle response sharpens noticeably, and gear changes feel more immediate in a way that's hard to unfeel once you've experienced it.

What separates this flywheel from the cheapest lightweight options on the market is that AdlerSpeed engineered it to remain livable. Going too light compromises idle quality and low-speed drivability; this unit is balanced to hit the performance sweet spot without introducing the loping idle or sluggish off-idle response that plague ultra-light competitors. The result is a flywheel that works as well in daily traffic as it does on a road course.

The construction details are thorough. A TIG-welded safety tab eliminates ring gear migration under high-rpm stress, while Helicoil inserts in every bolt hole protect against thread pull-out through repeated installation and torque cycles. The coarse-ground friction surface maintains the correct coefficient of friction for reliable clutch engagement, and stepped locating pins keep the pressure plate precisely aligned and balanced. The flywheel meets SFI 1.1 specification, making it a legitimate choice for sanctioned track events.

This flywheel is compatible with BMW E34, E36, and E39 chassis running M50, M52, S50, S52, or S54 engines — but correct fitment requires pairing it with a 96–99 BMW M3 clutch assembly. No installation instructions are included, and given the drivetrain-level complexity of the job, professional installation is strongly recommended.