Which rotor do the GiroDisc Front Replacement Rings for F8X fit?

The GiroDisc Front Replacement Rings for F8X fit the GiroDisc A1-194 rotor, which GiroDisc makes for BMW M cars using the AP/Essex big brake kit. GiroDisc names the rings for that rotor in its own product title, and they bolt only to its aluminum hats.

Do the F8X rings fit the discs supplied with the AP Essex kit?

No. These rings are designed for GiroDisc hats only. A car still running the discs that came with its AP/Essex kit needs the complete GiroDisc A1-194 rotors first, after which these rings can be used whenever the iron wears out.

What is the diameter of the BMW kit ring?

GiroDisc lists a rotor outer diameter of 372mm for this ring, matching the 372x36mm A1-194 rotor. The pair arrives as a handed left and right ring with replacement hardware, ready to bolt straight to the existing GiroDisc hats on the car.

What hardware comes with the BMW kit rings?

GiroDisc supplies replacement mounting hardware with every ring pair, so the fasteners are renewed along with the iron. The aluminum hats from the existing A1-194 rotors are the only parts carried over, which keeps the cost of each ring change down.

How are worn BMW kit rings identified?

GiroDisc marks the minimum thickness on the hat and the edge of each ring. Replace the pair when a measurement across the friction face reaches that figure, or if a crack runs out to the edge of the ring, whichever happens first.

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Description

GiroDisc Front Replacement Rings for F8X BMW M2, M3 and M4 with AP/Essex Big Brake Kit

GiroDisc’s Front Replacement Rings for F8X BMW M2, M3 and M4 renew the iron on the A1-194 rotor, the 372mm GiroDisc disc made for cars running the AP/Essex big brake kit. GiroDisc names these rings specifically for A1-194, and they bolt to the existing aluminum hats with new hardware supplied. Each ring is poured in the USA from GiroDisc’s own iron and machined in Bellingham, Washington. An M car that sees enough track time to wear through 36mm rings will appreciate replacing only the iron.

Fitment and Installation

The GiroDisc Front Replacement Rings for F8X fit the hats of the GiroDisc A1-194 rotor and nothing else; they do not suit the kit’s original discs, factory BMW rotors or other brands of hat. With the rotors on the bench, unbolt the worn rings, fit the new pair with the supplied hardware, and tighten the cap screws to no more than 60 in-lb (7 Nm).

Features

372mm outer diameter
Made for the hats of GiroDisc A1-194 rotors
For cars on the AP/Essex big brake kit
GiroDisc iron, poured in the USA
Replacement mounting hardware included
Directional left and right rings

What’s Included

Front replacement rings (L/R)
Replacement mounting hardware

Applications

BMW M2: F8X | with GiroDisc A1-194 rotors on the AP/Essex kit
BMW M3: E9X | with GiroDisc A1-194 rotors on the AP/Essex kit
BMW M3: F8X | with GiroDisc A1-194 rotors on the AP/Essex kit
BMW M4: F8X | with GiroDisc A1-194 rotors on the AP/Essex kit

Notes

These rings fit the hats of the GiroDisc AP/Essex kit front rotors only
The aluminum hats are not included
Cars on factory BMW brakes cannot use these rings
Stock photography may not depict the actual product

Frequently Asked Questions

Which rotor do the GiroDisc Front Replacement Rings for F8X fit? The GiroDisc Front Replacement Rings for F8X fit the GiroDisc A1-194 rotor, which GiroDisc makes for BMW M cars using the AP/Essex big brake kit. GiroDisc names the rings for that rotor in its own product title, and they bolt only to its aluminum hats.
Do the F8X rings fit the discs supplied with the AP Essex kit? No. These rings are designed for GiroDisc hats only. A car still running the discs that came with its AP/Essex kit needs the complete GiroDisc A1-194 rotors first, after which these rings can be used whenever the iron wears out.
What is the diameter of the BMW kit ring? GiroDisc lists a rotor outer diameter of 372mm for this ring, matching the 372x36mm A1-194 rotor. The pair arrives as a handed left and right ring with replacement hardware, ready to bolt straight to the existing GiroDisc hats on the car.
What hardware comes with the BMW kit rings? GiroDisc supplies replacement mounting hardware with every ring pair, so the fasteners are renewed along with the iron. The aluminum hats from the existing A1-194 rotors are the only parts carried over, which keeps the cost of each ring change down.
How are worn BMW kit rings identified? GiroDisc marks the minimum thickness on the hat and the edge of each ring. Replace the pair when a measurement across the friction face reaches that figure, or if a crack runs out to the edge of the ring, whichever happens first.

About GiroDisc

GiroDisc designs, manufactures, and sells 2-piece, fully floating brake rotors for a wide range of performance vehicles. Every major component, including the hats, rotor rings, and drive pins, is manufactured in-house at their facility in Bellingham, Washington, from domestically sourced materials. GiroDisc rotors use a proprietary high-carbon iron ring formulated for superior metallurgy and thermal performance, paired with reusable machined-aluminum hats that reduce the long-term cost of maintaining a high-performance brake system. The 2-piece floating design sheds unsprung and rotating mass while remaining street-friendly, delivering race-proven braking for track and street use alike.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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GiroDisc Front Replacement Rings for F8X BMW M2, M3 and M4 with AP/Essex Big Brake Kit [D1-194]

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GiroDisc Front Replacement Rings for F8X BMW M2, M3 and M4 with AP/Essex Big Brake Kit

Fitment and Installation

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews