Which Mustang models do the GiroDisc Front Rotors for S650 fit?

The GiroDisc Front Rotors for S650 fit the Mustang GT with the Performance Package, the Dark Horse and the Dark Horse SC, provided the car has the 390mm six-piston Brembo front brakes in iron. Cars built with the optional carbon ceramic brakes are not covered.

Do the factory Brembo calipers stay on the car with these rotors?

Yes. GiroDisc builds these as a direct replacement for the factory front discs, so the six-piston Brembo calipers, the brake bias and the ABS calibration all stay as Ford engineered them. The assemblies bolt to the hub where the original discs sat.

How much does each S650 front rotor weigh?

GiroDisc lists each complete front assembly at 30.3 lb, including the aluminum hat, the iron ring and the drive pin hardware. That covers a 390mm by 36mm disc with 72 curved vanes, built to trim unsprung weight and rotating mass at the front axle.

When should the S650 front rings be replaced and which part number fits?

Replace the rings at the 34mm minimum thickness marked on the hat and ring edge, or sooner if a crack runs out to the edge. The replacement is GiroDisc D1-343, sold as a pair with fresh hardware, and it bolts onto the hats you already own.

Will the floating front rings rattle on the street?

No. GiroDisc fits spring clips and spring washers to the drive pins, so the ring floats as a track disc should while staying quiet over broken pavement when cold. The cap screws are never tightened past 60 in-lb, which is 7 Nm, and can look loose by design.

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Description

GiroDisc Front Rotors for S650 Ford Mustang with 6-Piston Brembo Brakes

GiroDisc’s Front Rotors for S650 Ford Mustang models with the 390mm six-piston Brembo iron brakes replace the factory discs on the GT Performance Package, Dark Horse and Dark Horse SC. Each assembly measures 390mm by 36mm, carries 72 curved vanes and weighs 30.3 lb complete. The black anodized 6061-T6 hat and the high-carbon iron ring are both made in Bellingham, Washington. Owners who lap their S650 often and prefer to re-ring a disc than bin it will get the most from this set.

Fitment and Installation

These bolt on as a direct replacement, so the six-piston Brembo calipers go back on unchanged and brake balance stays where Ford set it. Spring clips and washers on the cadmium-plated drive pins give the ring float without rattle. Once the rings reach minimum thickness, the hats are kept and only fresh rings are fitted.

Features

72 curved vanes that draw air in at the hub and pump it out through the disc
Black anodized 6061-T6 aluminum hat, reused when the rings are renewed
High-carbon iron ring cast to GiroDisc specification
Cadmium-plated steel drive pins with spring clips and spring washers
Slotted face that clears debris and breaks up water film

Specifications

Outer diameter: 390mm
Thickness: 36mm
Minimum thickness: 34mm
Weight: 30.3 lb per rotor assembly
Vane count: 72 curved vanes

What’s Included

Front rotor assemblies (L/R)

Applications

Ford Mustang Dark Horse: S650 | 5.0L V8
Ford Mustang Dark Horse SC: S650
Ford Mustang GT with Performance Package: S650 | 5.0L V8

Notes

The GiroDisc Front Rotors for S650 fit iron-braked cars only; cars with the optional carbon ceramic brakes are not covered
Replacement rings for these hats are the GiroDisc S650 front replacement rings
The GiroDisc S650 rear rotors suit the four-piston Brembo rear brakes on the same cars
Stock photography may not depict the actual product

Frequently Asked Questions

Which Mustang models do the GiroDisc Front Rotors for S650 fit? The GiroDisc Front Rotors for S650 fit the Mustang GT with the Performance Package, the Dark Horse and the Dark Horse SC, provided the car has the 390mm six-piston Brembo front brakes in iron. Cars built with the optional carbon ceramic brakes are not covered.
Do the factory Brembo calipers stay on the car with these rotors? Yes. GiroDisc builds these as a direct replacement for the factory front discs, so the six-piston Brembo calipers, the brake bias and the ABS calibration all stay as Ford engineered them. The assemblies bolt to the hub where the original discs sat.
How much does each S650 front rotor weigh? GiroDisc lists each complete front assembly at 30.3 lb, including the aluminum hat, the iron ring and the drive pin hardware. That covers a 390mm by 36mm disc with 72 curved vanes, built to trim unsprung weight and rotating mass at the front axle.
When should the S650 front rings be replaced and which part number fits? Replace the rings at the 34mm minimum thickness marked on the hat and ring edge, or sooner if a crack runs out to the edge. The replacement is GiroDisc D1-343, sold as a pair with fresh hardware, and it bolts onto the hats you already own.
Will the floating front rings rattle on the street? No. GiroDisc fits spring clips and spring washers to the drive pins, so the ring floats as a track disc should while staying quiet over broken pavement when cold. The cap screws are never tightened past 60 in-lb, which is 7 Nm, and can look loose by design.

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 Rotors for S650 Ford Mustang with 6-Piston Brembo Brakes [A1-343]

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GiroDisc Front Rotors for S650 Ford Mustang with 6-Piston Brembo Brakes

Fitment and Installation

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews