Do the Rear Rotors for B7 Audi RS4 cars need spacers?

No. Unlike the GiroDisc front kit, the Rear Rotors for B7 Audi RS4 models keep the factory size and bolt on directly. The original rear calipers go back on unchanged, and the brake bias and ABS calibration stay as Audi set them.

What diameter are the GiroDisc B7 RS4 rear rotors?

GiroDisc lists the rotor outer diameter as 324mm for this rear application, the size carried by the matching D2-100 replacement rings. The rings use curved internal vanes and a slotted face, and they float on the hat via ten drive pins.

Will a set of these make noise when cold?

No. GiroDisc mounts each drive pin with an anti-noise spring washer on the ring side. The washer lets the ring expand with heat, which is the purpose of a floating disc, while removing the light rattle that unsprung floating hardware can make at low speed.

Is it worth changing the rear rotors on an RS4?

Yes, if the car sees track days or hard road use. The rear discs share in the heat load, and GiroDisc rotors are lighter than stock and reusable at the hat, so later services need only the D2-100 rings rather than full rotors.

Do the left and right rotors differ?

Yes. Curved vanes must sweep in the direction of rotation to pull air out through the ring, so the rotors are handed. GiroDisc labels each one for its corner, and installing them on the wrong sides sacrifices a large part of their cooling.

Description

Additional Info

Shipping policy

BP PRICING DIFFERENCE

Reviews

Product Inquiry

Description

GiroDisc Rear Rotors for B7 Audi RS4

GiroDisc’s Rear Rotors for B7 Audi RS4 models are a bolt-on two-piece replacement for the factory rear discs, with 324mm iron rings floating on aluminum hats. They keep the stock calipers and the brake bias Audi set, which matters on a quattro chassis tuned around its ABS and stability systems. Owners who have fitted the GiroDisc 380mm fronts should finish the job here, so both axles run the same reusable-hat design.

Bolt-On and Go

No spacers, no machining: the rotors bolt to the rear hubs and the original calipers refit as they came off. Ten cadmium-plated alloy steel drive pins carry the ring, and anti-noise spring washers keep it silent when cold while letting it grow with heat.

Features

324mm rotor outer diameter
Lighter than the factory rear disc, per GiroDisc
10 cadmium-plated alloy steel drive pins with class 12.9 cap screws
US-sourced 6061-T6 aluminum hat
Curved vanes that pump air through the ring
Ring replaceable on its own when worn

What’s Included

Rear rotor assemblies (L/R)

Applications

Audi RS4: B7 | 4.2L V8

Notes

The GiroDisc Rear Rotors for B7 Audi RS4 cars are a direct replacement with no modification
Worn rings are renewed with the GiroDisc B7 RS4 rear replacement rings on these hats
The front axle takes the GiroDisc 380mm B7 RS4 front rotors
Cap screws are never tightened beyond 60 in-lb (7 Nm)
Stock photography may not depict the actual product

Frequently Asked Questions

Do the Rear Rotors for B7 Audi RS4 cars need spacers? No. Unlike the GiroDisc front kit, the Rear Rotors for B7 Audi RS4 models keep the factory size and bolt on directly. The original rear calipers go back on unchanged, and the brake bias and ABS calibration stay as Audi set them.
What diameter are the GiroDisc B7 RS4 rear rotors? GiroDisc lists the rotor outer diameter as 324mm for this rear application, the size carried by the matching D2-100 replacement rings. The rings use curved internal vanes and a slotted face, and they float on the hat via ten drive pins.
Will a set of these make noise when cold? No. GiroDisc mounts each drive pin with an anti-noise spring washer on the ring side. The washer lets the ring expand with heat, which is the purpose of a floating disc, while removing the light rattle that unsprung floating hardware can make at low speed.
Is it worth changing the rear rotors on an RS4? Yes, if the car sees track days or hard road use. The rear discs share in the heat load, and GiroDisc rotors are lighter than stock and reusable at the hat, so later services need only the D2-100 rings rather than full rotors.
Do the left and right rotors differ? Yes. Curved vanes must sweep in the direction of rotation to pull air out through the ring, so the rotors are handed. GiroDisc labels each one for its corner, and installing them on the wrong sides sacrifices a large part of their cooling.

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 Rear Rotors for B7 Audi RS4 [A2-100]

Guaranteed Safe Checkout

GiroDisc Rear Rotors for B7 Audi RS4

Bolt-On and Go

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews