Why are the GiroDisc Rear Rotors for C7 Audi listed at 352mm and not 356mm?

Audi quotes the factory rear disc at 356mm, but that is measured to the tips of its petal-shaped edge. The friction surface ends about 2mm inside the petals, so GiroDisc sized the Rear Rotors for C7 Audi models to match where the braking actually happens, and nothing is lost in usable swept area.

Is the RS7 covered as well as the S models?

Yes. GiroDisc lists the C7 RS7 alongside the C7 S6 and S7 and the D4 S8 for this rear rotor. All four cars share the same rear disc dimensions, so one part number serves the whole group, and the same D2-187 rings renew any of them when the iron eventually wears out.

How light are these rear rotors?

GiroDisc weighs each complete rear assembly at 14.3 lb, aluminum hat and hardware included. That saving comes off a rotating, unsprung part of the car, so the suspension follows the road a little more closely and the drivetrain has slightly less inertia to turn on every launch.

When do the 22mm rear rings need replacing?

GiroDisc sets the minimum at 20mm, and that figure is marked on the hat and the ring edge. Replace the rings at that thickness, or sooner if a crack runs to the outer edge. Part D2-187 is the replacement pair.

Do the Rear Rotors for C7 Audi models need any modification to fit?

No. GiroDisc describes them as a direct replacement for the factory rear rotors on these cars. They bolt to the hub and the original calipers refit without spacers or machining, so the factory brake bias, the parking brake arrangement and the ABS behavior all stay exactly as Audi engineered them.

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Description

GiroDisc Rear Rotors for C7 Audi S6, S7, RS7 and D4 S8

GiroDisc’s Rear Rotors for C7 Audi S6, S7, RS7 and D4 S8 swap the factory flower-edged rear discs for a 352mm by 22mm floating assembly at 14.3 lb per corner. Forty-eight curved vanes run through each ring, and the black anodized aluminum hat stays on the car through every ring change. It suits the owner who has already sorted the front brakes and wants the rear axle to match in weight, cooling and long-term running cost.

Fitment and Installation

These are a direct replacement for the factory rear rotors, so the stock calipers go back on as they came off. GiroDisc sized the ring at 352mm on purpose: the OE disc is quoted at 356mm, but that figure is measured across the petal tips, and the working surface sits about 2mm inside them.

Features

352mm outer diameter and 22mm thickness
48 curved cooling vanes per ring
14.3 lb per complete rear assembly, by GiroDisc measurement
Black anodized 6061-T6 aluminum hat that is reused at every ring change
Two-piece floating design with cadmium-plated alloy steel drive pins
Iron rings cast in the USA and machined by GiroDisc

What’s Included

Rear rotor assemblies (L/R)

Applications

Audi RS7: C7 | 4.0L twin-turbo V8
Audi S6: C7 | 4.0L twin-turbo V8
Audi S7: C7 | 4.0L twin-turbo V8
Audi S8: D4 | 4.0L twin-turbo V8

Notes

The GiroDisc Rear Rotors for C7 Audi S6, S7, RS7 and D4 S8 replace the factory rear discs and reuse the stock calipers
Worn rings are renewed with the GiroDisc 352mm rear replacement rings, which bolt to these hats
The GiroDisc C7 and D4 front rotors complete the set on iron-braked S6, S7 and S8 models
Rings are due for replacement at 20mm or when a crack reaches the edge
Stock photography may not depict the actual product

Frequently Asked Questions

Why are the GiroDisc Rear Rotors for C7 Audi listed at 352mm and not 356mm? Audi quotes the factory rear disc at 356mm, but that is measured to the tips of its petal-shaped edge. The friction surface ends about 2mm inside the petals, so GiroDisc sized the Rear Rotors for C7 Audi models to match where the braking actually happens, and nothing is lost in usable swept area.
Is the RS7 covered as well as the S models? Yes. GiroDisc lists the C7 RS7 alongside the C7 S6 and S7 and the D4 S8 for this rear rotor. All four cars share the same rear disc dimensions, so one part number serves the whole group, and the same D2-187 rings renew any of them when the iron eventually wears out.
How light are these rear rotors? GiroDisc weighs each complete rear assembly at 14.3 lb, aluminum hat and hardware included. That saving comes off a rotating, unsprung part of the car, so the suspension follows the road a little more closely and the drivetrain has slightly less inertia to turn on every launch.
When do the 22mm rear rings need replacing? GiroDisc sets the minimum at 20mm, and that figure is marked on the hat and the ring edge. Replace the rings at that thickness, or sooner if a crack runs to the outer edge. Part D2-187 is the replacement pair.
Do the Rear Rotors for C7 Audi models need any modification to fit? No. GiroDisc describes them as a direct replacement for the factory rear rotors on these cars. They bolt to the hub and the original calipers refit without spacers or machining, so the factory brake bias, the parking brake arrangement and the ABS behavior all stay exactly as Audi engineered them.

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 Rear Rotors for C7 Audi S6, S7, RS7 and D4 S8 [A2-187]

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GiroDisc Rear Rotors for C7 Audi S6, S7, RS7 and D4 S8

Fitment and Installation

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews