How much weight do the GiroDisc 360mm Rear Rotors for R231 SL63 cars save?

GiroDisc measures the GiroDisc 360mm Rear Rotors for R231 SL63 AMG cars at about 16.6 lb each, against roughly 24.7 lb for the factory rear disc. That is around 8.1 lb less per corner, which GiroDisc says brings quicker acceleration and suspension response.

Do these rotors fit an SL63 with carbon-ceramic brakes?

No. These rotors replace the factory iron rear disc on the R231 SL63 AMG. Cars built with the carbon-ceramic brake option are not covered by this part, so check the brake package on the car before ordering or ask Bulletproof Automotive to confirm.

What separates this rotor from the dimpled and slotted version?

GiroDisc offers this rear rotor in two finishes. This version, A2-148, has a slotted ring, while A2-148DS adds dimples to the slotted face. Both share the same 360mm size and the same two-piece floating construction with a reusable aluminum hat.

Will the SL63 factory calipers be reused?

Yes. GiroDisc lists the rotor as a direct replacement with no modifications. The original calipers bolt back over the new rotors, so the brake bias and ABS operation remain exactly as Mercedes-AMG engineered them for the SL63. No spacers or brackets are involved.

What keeps the floating rear rings from rattling?

Each of the ten drive pins is fitted with an anti-noise spring washer on the rotor side. The washer lets the ring grow as it heats while holding it snug when cold, so the SL63 stays quiet around town despite the race-derived floating design.

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Description

GiroDisc 360mm Rear Rotors for R231 Mercedes-Benz SL63 AMG

GiroDisc’s 360mm Rear Rotors for R231 Mercedes-Benz SL63 AMG roadsters weigh about 16.6 lb each against 24.7 lb for the factory disc, by GiroDisc measurement, so each rear corner sheds roughly 8.1 lb. They are a direct replacement for cars on iron brakes, with no modifications and the original calipers retained. The ring is GiroDisc’s own US-poured iron on a 6061-T6 hat, a strong fit for an SL63 owner who wants less unsprung weight without a big brake kit.

Bolt-On and Go

Each rotor bolts to the hub in place of the stock iron disc and the factory caliper refits unchanged, keeping the brake bias and ABS calibration Mercedes-AMG set. Ten cadmium-plated alloy steel drive pins carry the slotted ring on its hat, anti-noise spring washers stop cold rattle, and curved vanes pump air outward through the disc.

Features

About 8.1 lb lighter per rotor than stock, by GiroDisc measurement
Direct replacement for the factory iron rear disc
Original calipers, bias and ABS retained
Slotted friction face
Ten GiroDisc-made, cadmium-plated drive pins
Reusable 6061-T6 aluminum hats

What’s Included

Rear rotor assemblies (L/R)

Applications

Mercedes-Benz SL63 AMG, excluding carbon-ceramic brakes: R231 | 5.5L twin-turbo V8

Notes

Cars with factory carbon-ceramic brakes are not covered by the 360mm Rear Rotors for R231 SL63 models
GiroDisc lists the GiroDisc Mercedes 360mm rear replacement rings with this rotor; confirm the match with Bulletproof Automotive when ordering rings
A GiroDisc dimpled and slotted version of this rotor is also available
Rotors are left and right handed and labeled for position
Stock photography may not depict the actual product

Frequently Asked Questions

How much weight do the GiroDisc 360mm Rear Rotors for R231 SL63 cars save? GiroDisc measures the GiroDisc 360mm Rear Rotors for R231 SL63 AMG cars at about 16.6 lb each, against roughly 24.7 lb for the factory rear disc. That is around 8.1 lb less per corner, which GiroDisc says brings quicker acceleration and suspension response.
Do these rotors fit an SL63 with carbon-ceramic brakes? No. These rotors replace the factory iron rear disc on the R231 SL63 AMG. Cars built with the carbon-ceramic brake option are not covered by this part, so check the brake package on the car before ordering or ask Bulletproof Automotive to confirm.
What separates this rotor from the dimpled and slotted version? GiroDisc offers this rear rotor in two finishes. This version, A2-148, has a slotted ring, while A2-148DS adds dimples to the slotted face. Both share the same 360mm size and the same two-piece floating construction with a reusable aluminum hat.
Will the SL63 factory calipers be reused? Yes. GiroDisc lists the rotor as a direct replacement with no modifications. The original calipers bolt back over the new rotors, so the brake bias and ABS operation remain exactly as Mercedes-AMG engineered them for the SL63. No spacers or brackets are involved.
What keeps the floating rear rings from rattling? Each of the ten drive pins is fitted with an anti-noise spring washer on the rotor side. The washer lets the ring grow as it heats while holding it snug when cold, so the SL63 stays quiet around town despite the race-derived floating 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 360mm Rear Rotors for R231 Mercedes-Benz SL63 AMG [A2-148]

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GiroDisc 360mm Rear Rotors for R231 Mercedes-Benz SL63 AMG

Bolt-On and Go

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews