BMW M12 STD Flywheel

Flywheels
Written By Ark Racing Limited

Ark Racing® Limited presents a bespoke BMW M12 Standard Flywheel engineered specifically for professional motorsport teams. Designed, developed, and manufactured entirely in-house, this flywheel is designed to deliver uncompromising performance under the extreme conditions of competitive racing. Precision-machined from high-quality steel and treated with advanced Nitride heat hardening and shot-peened surface finishing. Weighing just 2.93 kg, it offers exceptional strength, durability, and fatigue resistance. Optimised for reduced rotational mass, the BMW M12 flywheel enhances throttle response and drivetrain efficiency—making it the ideal choice for racing teams seeking precision, reliability, and performance at the highest level of motorsport.

A direct replacement for the original flywheel. Can be supplied at a lighter weight (Mass) if required.

Suitable for: BMW M12

Specification:

Material: 817M40T (Steel)
Heat Treatment: Nitride
Surface Treatment: Shot Peened
Starter Ring: Cut into the flywheel (Not a separate Ring Gear)
Outside Diameter: Ø264.40 mm
Mass: 2.93 Kg (6.45 lb)

weight convertor icon link to page Mass Convertor

NOTE: *It is a myth that a lightweight flywheel gives you more power. It actually doesn’t!

What it does achieve is it reduces the rotating mass and inertia in your vehicle. The result is your engine isn’t using valuable horsepower spinning up a heavy flywheel, it’s going straight to your wheels onto the road which is where you need it, with the bonus of making your car lighter.

ALSO AVAILABLE for use with Flywheels requiring Clutch Bolts

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ALSO AVAILABLE for use with Flywheels requiring Clutch Bolts |

We recommend using our Clutch Bolts which come with
K-Nuts at a competitive price, in some instances, SAVING 25% over our competitors.

Image: Ark Racing clutch mounting bolts.

SAVE up to 25% over competitors

More sizes are available
or can be produced please call

📞0345 557 7408

More sizes are available or can be produced in Concentric & Eccentric variants, please enquire.

Ark Racing design and manufacture numerous Starters and Flywheels for a variety of BMW engines for Motorsport & Historic Sports Cars.

BMW M12 Starter Motor | BMW M10 Starter Motor | BMW M12 STD Flywheel | BMW 130i Lightweight Ver. B Flywheel | BMW 130i Lightweight Ver. C Flywheel | BMW Conversion Flywheel

If you can’t find what you’re looking for, contact us.

Ark Racing can create a solution to meet your requirements.

Call us on +44 (0)345 557 7408 or complete our online contact form.

Contact Us
Ark Racing Limited

We design, develop, and manufacture bespoke starter motor systems, high-quality flywheels, and provide precision machining for the professional motorsport industry.

Located in Willenhall in the West Midlands, we pride ourselves on delivering a professional service.

Established in 1968, Ark Racing® Limited provide a complete service, from concept to the finished product.

We also provide precision and sub-contract machining via our other website, www.arkcnc.co.uk.

https://www.arkracing.com
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