Which Mustang do the GiroDisc Front Rotors for S550 fit?

The GiroDisc Front Rotors for S550 listed here fit the Ford Mustang Shelby GT350. They replace its 394mm front discs and reuse the factory calipers. Other S550 Mustangs carry different brakes and need a different GiroDisc part number, so match the car before ordering.

Is any machining or spacing needed to fit these GT350 front rotors?

No. GiroDisc builds this front assembly as a direct replacement for the original disc, so it bolts to the hub and the factory calipers refit without spacers, brackets or machining. That also leaves the factory brake bias and ABS behavior unchanged.

How are the GT350 front rings renewed when they wear out?

Order the GiroDisc D1-162 front replacement rings. They are sold in pairs with new hardware and bolt to the aluminum hats already on the car. Replace the rings at the minimum thickness marked on the hat and ring edge, or if a crack reaches the edge.

What keeps a floating GT350 front rotor from rattling?

Anti-noise spring washers fitted on the ring side of each drive pin. They let the iron ring grow as it heats while removing the cold rattle often heard from floating discs. The 12 drive pins carry the braking load and still allow the ring to float axially and radially.

Can the GT350 front rotors be fitted to either side?

No. The curved vanes are directional and only pump air outward when they rotate the right way. GiroDisc makes left and right handed rotors and labels each one for its position, so fit them on the side marked and check the vane direction before torquing the wheels.

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Description

GiroDisc Front Rotors for S550 Ford Mustang Shelby GT350

GiroDisc’s Front Rotors for S550 Ford Mustang Shelby GT350 replace the factory 394mm front discs as a direct, no-modification swap that keeps the original calipers. For a GT350 owner who laps regularly, the appeal is simple: once the GiroDisc hats are fitted, only the iron rings are bought again. Each ring floats on a 6061-T6 aluminum hat through 12 high-strength alloy steel drive pins, and curved vanes cast into the iron draw air out from the hub.

Bolt-On and Go

The assembly bolts directly to the car and works with the factory calipers, so the brake balance Ford engineered stays as it was. The Front Rotors for S550 GT350 use class 12.9 cap screws with hardened washers to hold the drive pins, and anti-noise spring washers keep the floating ring quiet on cold mornings while still letting it expand under heat.

Features

394mm outer diameter to match the factory GT350 front disc
Direct replacement that works with the original calipers
12 cadmium-plated alloy steel drive pins
Curved vanes that pump air from the hub through the disc
6061-T6 aircraft-specification aluminum hat
Rotors labeled left and right for correct vane direction

What’s Included

Front rotor assemblies (L/R)

Applications

Ford Mustang Shelby GT350: S550 | 5.2L V8

Notes

Worn rings are renewed with the GiroDisc GT350 front replacement rings, which bolt to these hats
The matching GiroDisc GT350 rear rotors complete the set
The cap screws can look loose by design and are never tightened beyond 60 in-lb (7 Nm)
Stock photography may not depict the actual product

Frequently Asked Questions

Which Mustang do the GiroDisc Front Rotors for S550 fit? The GiroDisc Front Rotors for S550 listed here fit the Ford Mustang Shelby GT350. They replace its 394mm front discs and reuse the factory calipers. Other S550 Mustangs carry different brakes and need a different GiroDisc part number, so match the car before ordering.
Is any machining or spacing needed to fit these GT350 front rotors? No. GiroDisc builds this front assembly as a direct replacement for the original disc, so it bolts to the hub and the factory calipers refit without spacers, brackets or machining. That also leaves the factory brake bias and ABS behavior unchanged.
How are the GT350 front rings renewed when they wear out? Order the GiroDisc D1-162 front replacement rings. They are sold in pairs with new hardware and bolt to the aluminum hats already on the car. Replace the rings at the minimum thickness marked on the hat and ring edge, or if a crack reaches the edge.
What keeps a floating GT350 front rotor from rattling? Anti-noise spring washers fitted on the ring side of each drive pin. They let the iron ring grow as it heats while removing the cold rattle often heard from floating discs. The 12 drive pins carry the braking load and still allow the ring to float axially and radially.
Can the GT350 front rotors be fitted to either side? No. The curved vanes are directional and only pump air outward when they rotate the right way. GiroDisc makes left and right handed rotors and labels each one for its position, so fit them on the side marked and check the vane direction before torquing the wheels.

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 S550 Ford Mustang Shelby GT350 [A1-162]

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GiroDisc Front Rotors for S550 Ford Mustang Shelby GT350

Bolt-On and Go

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews