How do the GiroDisc 360mm Dimpled Slotted Rear Rotors differ from the slotted version?

The GiroDisc 360mm Dimpled Slotted Rear Rotors add dimples to the slotted friction face. Otherwise they match the slotted A2-148: the same R231 SL63 fitment, the same two-piece floating construction and the same weight of about 16.6 lb per rotor, by GiroDisc measurement.

Are these rotors lighter than the SL63 factory rear discs?

Yes. GiroDisc weighs each rotor at about 16.6 lb against roughly 24.7 lb for the stock disc, around 8.1 lb less per corner. Lower rotating and unsprung weight, GiroDisc notes, helps the car accelerate and lets the suspension respond more quickly.

Does the dimpled rotor suit a carbon-ceramic equipped SL63?

No. The rotor replaces the factory iron rear disc on the R231 SL63 AMG. Cars built with the carbon-ceramic option are excluded, so Bulletproof Automotive recommends checking the brake specification of the car before ordering this or the slotted version.

Can the dimpled rings be replaced on their own?

Yes. The two-piece design means the aluminum hats stay on the car and only the iron rings are renewed. GiroDisc lists a dimpled and slotted 360mm rear ring set, D2-123DS, with this rotor, supplied in pairs with fresh hardware. Only the hats carry over.

Is installation any different from a factory rear disc?

No. GiroDisc lists the rotor as a direct replacement needing no modifications. It bolts to the hub, the original caliper goes back over it, and the brake bias and ABS remain as the car was built. Each rotor is labeled for its side.

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Description

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

GiroDisc’s 360mm Dimpled Slotted Rear Rotors for R231 Mercedes-Benz SL63 AMG cars pair a dimpled and slotted friction face with the same two-piece floating construction as the slotted A2-148, and GiroDisc weighs each at about 16.6 lb against 24.7 lb for the factory disc. They bolt on as a direct replacement for iron-braked cars and keep the original calipers. Choose these over the slotted version if you prefer the dimpled look behind the wheels of the SL63.

Design and Performance

The ring carries both dimples and slots on its face and is cast from GiroDisc’s proprietary iron, poured in the USA and finished in Bellingham, Washington. Curved internal vanes pump air from the hub out through the disc. The ring floats on ten cadmium-plated drive pins with class 12.9 cap screws, and spring washers keep it quiet when cold.

Features

Dimpled and slotted friction face
About 8.1 lb lighter per rotor than stock, per GiroDisc
Direct replacement for the factory iron rear disc
Original calipers, bias and ABS retained
Cadmium-plated alloy steel drive pins with anti-noise spring washers
US-sourced 6061-T6 aluminum hat

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 Dimpled Slotted Rear Rotors for R231 SL63 models
GiroDisc lists the GiroDisc dimpled and slotted Mercedes 360mm rear replacement rings with this rotor; confirm the match with Bulletproof Automotive when ordering rings
The GiroDisc slotted 360mm rear rotors offer the same fitment with a slotted-only face
Cap screws are never tightened beyond 60 in-lb, or 7 Nm
Stock photography may not depict the actual product

Frequently Asked Questions

How do the GiroDisc 360mm Dimpled Slotted Rear Rotors differ from the slotted version? The GiroDisc 360mm Dimpled Slotted Rear Rotors add dimples to the slotted friction face. Otherwise they match the slotted A2-148: the same R231 SL63 fitment, the same two-piece floating construction and the same weight of about 16.6 lb per rotor, by GiroDisc measurement.
Are these rotors lighter than the SL63 factory rear discs? Yes. GiroDisc weighs each rotor at about 16.6 lb against roughly 24.7 lb for the stock disc, around 8.1 lb less per corner. Lower rotating and unsprung weight, GiroDisc notes, helps the car accelerate and lets the suspension respond more quickly.
Does the dimpled rotor suit a carbon-ceramic equipped SL63? No. The rotor replaces the factory iron rear disc on the R231 SL63 AMG. Cars built with the carbon-ceramic option are excluded, so Bulletproof Automotive recommends checking the brake specification of the car before ordering this or the slotted version.
Can the dimpled rings be replaced on their own? Yes. The two-piece design means the aluminum hats stay on the car and only the iron rings are renewed. GiroDisc lists a dimpled and slotted 360mm rear ring set, D2-123DS, with this rotor, supplied in pairs with fresh hardware. Only the hats carry over.
Is installation any different from a factory rear disc? No. GiroDisc lists the rotor as a direct replacement needing no modifications. It bolts to the hub, the original caliper goes back over it, and the brake bias and ABS remain as the car was built. Each rotor is labeled for its side.

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 Dimpled Slotted Rear Rotors for R231 Mercedes-Benz SL63 AMG [A2-148DS]

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

Design and Performance

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews