Which vehicles take the GiroDisc 348mm Front Rotors for Toyota GR Supra and BMW?

The GiroDisc 348mm Front Rotors for Toyota GR Supra 3.0 cars, excluding the Final Edition, also fit the G2X M340i and M440i with optional M Sport brakes, the G01 X3 M40i, G02 X4 M40i and G29 Z4 M40i. GiroDisc notes other BMW G-chassis vehicles with 348mm front discs may fit as well.

Does the GR Supra Final Edition use these front rotors?

No. GiroDisc excludes the Final Edition from this front rotor listing. The standard GR Supra 3.0 is covered, but the Final Edition is not, so owners of that model should contact Bulletproof Automotive to discuss what GiroDisc offers for it.

How heavy is each front rotor assembly?

GiroDisc lists each front assembly at 24.8 lb, complete with its aluminum hat and drive hardware. The ring is 348mm across and 36mm thick, with 72 curved vanes inside to move cooling air from the hub out through the disc on every stop.

What is the minimum thickness for the front rings?

GiroDisc gives a minimum thickness of 34mm for these rings, against a new thickness of 36mm. Replace the rings with GiroDisc part number D1-307 once they reach 34mm, or immediately if a crack forms that runs to the edge of the ring.

Are the hats on these front rotors reusable?

Yes. The black-anodized 6061-T6 aluminum hat is designed to be kept and fitted with new rings when the originals wear out. Only the rings and their hardware are replaced, which lowers the running cost for owners who use the brakes hard on track.

Description

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Description

GiroDisc 348mm Front Rotors for Toyota GR Supra 3.0 and BMW G-Chassis M Performance Models

GiroDisc’s 348mm Front Rotors for Toyota GR Supra 3.0 and BMW G-chassis M Performance models replace the factory 348mm front discs with a two-piece floating assembly weighing 24.8 lb, by GiroDisc measurement. The 36mm ring carries 72 curved vanes and is machined from GiroDisc’s high-carbon iron casting, while the hat is black-anodized 6061-T6 aluminum. It is the rotor for a Supra or M340i owner who laps regularly and prefers renewing rings to buying complete discs each season.

Fitment and Installation

GiroDisc lists the rotor as a direct replacement for the 348mm front disc on the GR Supra 3.0, excluding the Final Edition, on G2X M340i and M440i with the optional M Sport brakes, and on the X3 M40i, X4 M40i and Z4 M40i. Other BMW G-chassis vehicles with a 348mm front disc may also take it; check with us before ordering.

Features

72 curved vanes pulling air in at the hub
Black-anodized 6061-T6 aluminum hat
Hats, rings and drive pins made in-house in Bellingham, Washington
Spring clips and spring washers for float without loose-hardware noise
Cadmium-plated high-strength steel drive pins
Reusable hat that accepts new rings when the old ones wear

Specifications

Outer diameter: 348mm
Thickness: 36mm
Minimum thickness: 34mm
Weight: 24.8 lb per rotor assembly
Vane count: 72 curved vanes

What’s Included

Front rotor assemblies (L/R)

Applications

BMW M340i with optional M Sport brakes: G2X
BMW M440i with optional M Sport brakes: G2X
BMW X3 M40i: G01
BMW X4 M40i: G02
BMW Z4 M40i: G29
Toyota GR Supra, excluding Final Edition: 3.0L

Notes

GR Supra Final Edition cars are not covered by the 348mm Front Rotors for Toyota and BMW applications listed here
Replacement rings are the GiroDisc 348mm front replacement rings, which bolt to these hats
The rear axle takes the GiroDisc 345mm rear rotors
Replace the rings at 34mm minimum thickness or if a crack reaches the edge
Stock photography may not depict the actual product

Frequently Asked Questions

Which vehicles take the GiroDisc 348mm Front Rotors for Toyota GR Supra and BMW? The GiroDisc 348mm Front Rotors for Toyota GR Supra 3.0 cars, excluding the Final Edition, also fit the G2X M340i and M440i with optional M Sport brakes, the G01 X3 M40i, G02 X4 M40i and G29 Z4 M40i. GiroDisc notes other BMW G-chassis vehicles with 348mm front discs may fit as well.
Does the GR Supra Final Edition use these front rotors? No. GiroDisc excludes the Final Edition from this front rotor listing. The standard GR Supra 3.0 is covered, but the Final Edition is not, so owners of that model should contact Bulletproof Automotive to discuss what GiroDisc offers for it.
How heavy is each front rotor assembly? GiroDisc lists each front assembly at 24.8 lb, complete with its aluminum hat and drive hardware. The ring is 348mm across and 36mm thick, with 72 curved vanes inside to move cooling air from the hub out through the disc on every stop.
What is the minimum thickness for the front rings? GiroDisc gives a minimum thickness of 34mm for these rings, against a new thickness of 36mm. Replace the rings with GiroDisc part number D1-307 once they reach 34mm, or immediately if a crack forms that runs to the edge of the ring.
Are the hats on these front rotors reusable? Yes. The black-anodized 6061-T6 aluminum hat is designed to be kept and fitted with new rings when the originals wear out. Only the rings and their hardware are replaced, which lowers the running cost for owners who use the brakes hard on track.

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 348mm Front Rotors for Toyota GR Supra 3.0 and BMW G-Chassis M Performance Models [A1-307]

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GiroDisc 348mm Front Rotors for Toyota GR Supra 3.0 and BMW G-Chassis M Performance Models

Fitment and Installation

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews