Do the GiroDisc Front Rotors for E9X and F8X fit the factory BMW calipers?

No. The GiroDisc Front Rotors for E9X and F8X are made for cars that already have the AP Racing big brake kit sold by Essex. They suit that kit with either the 9660 or the 9668 caliper, not the brakes BMW fitted at the factory.

Which caliper variants does the AP Essex kit rotor work with?

GiroDisc confirms compatibility with both the 9660 and the 9668 caliper variants of the AP/Essex big brake kit. If the kit on the car uses a different caliper, check with Bulletproof Automotive before ordering so the correct GiroDisc rotor can be identified.

What size is the GiroDisc rotor for the AP Essex kit?

GiroDisc lists it at 372mm in diameter and 36mm thick. That is the size of the disc used with the AP/Essex big brake kit on the F8X M2, M3 and M4 and on the E9X M3, so it replaces the kit rotor without changing the caliper mounting.

Which rings fit the AP Essex kit rotor hats?

GiroDisc lists D1-194 as the front replacement ring pair for this rotor. The rings come with new hardware and bolt to the existing GiroDisc aluminum hats, so only the iron is renewed when the 36mm rings wear down on track.

Why use a two-piece GiroDisc rotor on a big brake kit?

A two-piece rotor separates the iron ring that does the braking from the aluminum hat that mounts it. The ring floats on drive pins and can expand with heat freely, and the hat is reused, so ring changes cost less than replacing complete discs.

Description

Additional Info

Shipping policy

BP PRICING DIFFERENCE

Reviews

Product Inquiry

Description

GiroDisc Front Rotors for E9X and F8X BMW M2, M3 and M4 with AP/Essex Big Brake Kit

GiroDisc’s Front Rotors for E9X and F8X BMW M cars are made for owners who have already fitted the AP Racing big brake kit sold by Essex, giving that kit a 372mm by 36mm GiroDisc two-piece floating disc. GiroDisc lists them for the F8X M2, M3 and M4 and for the E9X M3, and confirms compatibility with both the 9660 and 9668 caliper variants. The ring is cast from GiroDisc’s own iron and floats on a 6061-T6 aluminum hat. For a track-focused M car on that kit, this is a replacement disc built to the same standard as GiroDisc’s own complete systems.

Fitment and Installation

These rotors fit the AP/Essex kit, not the factory BMW brakes, so the car must already carry that kit’s 9660 or 9668 calipers. The GiroDisc Front Rotors for E9X and F8X then mount in place of the kit’s discs. Each rotor is handed for its curved vanes, and the cap screws that hold the drive pins are never tightened beyond 60 in-lb (7 Nm).

Features

372mm diameter and 36mm thickness
Compatible with the 9660 and 9668 caliper variants
Two-piece fully floating construction
6061-T6 aluminum hat
GiroDisc cast iron ring, poured in the USA
Curved vanes that pump air from the hub outward

What’s Included

Front rotor assemblies (L/R)

Applications

BMW M2: F8X | with AP/Essex big brake kit
BMW M3: E9X | with AP/Essex big brake kit | 4.0L V8
BMW M3: F8X | with AP/Essex big brake kit | 3.0L twin-turbo inline-six
BMW M4: F8X | with AP/Essex big brake kit | 3.0L twin-turbo inline-six

Notes

Cars on the factory BMW front brakes are not covered by this rotor
When the iron wears, fit the GiroDisc front replacement rings for the AP/Essex kit rotor to these hats
GiroDisc lists this rotor for the 9660 and 9668 caliper variants only
Stock photography may not depict the actual product

Frequently Asked Questions

Do the GiroDisc Front Rotors for E9X and F8X fit the factory BMW calipers? No. The GiroDisc Front Rotors for E9X and F8X are made for cars that already have the AP Racing big brake kit sold by Essex. They suit that kit with either the 9660 or the 9668 caliper, not the brakes BMW fitted at the factory.
Which caliper variants does the AP Essex kit rotor work with? GiroDisc confirms compatibility with both the 9660 and the 9668 caliper variants of the AP/Essex big brake kit. If the kit on the car uses a different caliper, check with Bulletproof Automotive before ordering so the correct GiroDisc rotor can be identified.
What size is the GiroDisc rotor for the AP Essex kit? GiroDisc lists it at 372mm in diameter and 36mm thick. That is the size of the disc used with the AP/Essex big brake kit on the F8X M2, M3 and M4 and on the E9X M3, so it replaces the kit rotor without changing the caliper mounting.
Which rings fit the AP Essex kit rotor hats? GiroDisc lists D1-194 as the front replacement ring pair for this rotor. The rings come with new hardware and bolt to the existing GiroDisc aluminum hats, so only the iron is renewed when the 36mm rings wear down on track.
Why use a two-piece GiroDisc rotor on a big brake kit? A two-piece rotor separates the iron ring that does the braking from the aluminum hat that mounts it. The ring floats on drive pins and can expand with heat freely, and the hat is reused, so ring changes cost less than replacing complete discs.

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.

Reviews

There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

Product Inquiry

First Name (*required)

Last Name (*required)

Your E-Mail (*required)

Telephone Number (*required)

Country (*required)

Vehicle Year / Make / Model (*required)

Please Explain What do you want to do with your vehicle

Additional Information (optional)

I agree to the terms & conditions and privacy policy and to have Bulletproof Automotive LLC contact me for promotion, marketing and other purposes via email, phone or SMS message.

GiroDisc Front Rotors for E9X and F8X BMW M2, M3 and M4 with AP/Essex Big Brake Kit [A1-194]

Guaranteed Safe Checkout

GiroDisc Front Rotors for E9X and 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