Is the GiroDisc 358mm Rear Iron Rotor Conversion a bolt-on part for the SL63?

Yes. GiroDisc describes the GiroDisc 358mm Rear Iron Rotor Conversion as a direct replacement for the factory disc with no modifications needed. It bolts to the car and works with the original calipers, keeping the factory brake bias and ABS efficiency.

Why move an SL63 from ceramic to iron rear rotors?

Iron rings are straightforward to renew. Once these rotors are fitted, only the rings are replaced as they wear, with the aluminum hats staying on the car. That suits owners who drive hard and want a serviceable rear rotor instead of a ceramic replacement.

How does the SL63 rear rotor manage heat on track?

Curved vanes cast into the ring work as a centrifugal pump, pulling air from the hub and pushing it out through the disc. The floating mount also lets the ring expand freely with heat instead of distorting against a rigid hat during long sessions.

What holds the ring to the hat on this rear rotor?

Ten high-strength alloy steel drive pins, made by GiroDisc in the USA and cadmium plated for corrosion resistance. Class 12.9 cap screws with hardened washers secure the pins, and spring washers on the rotor side stop the ring from rattling when cold.

Which rings rebuild these SL63 rear hats?

The matching rings are GiroDisc part number D2-207, the Mercedes 358mm rear replacement rings, sold in pairs with fresh hardware. Replace the rings at the minimum thickness marked on the hat and ring edge, or as soon as a crack reaches the edge.

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Description

GiroDisc 358mm Rear Iron Rotor Conversion for R231 Mercedes-Benz SL63 AMG

GiroDisc’s 358mm Rear Iron Rotor Conversion swaps the carbon ceramic rear discs of an R231 Mercedes-Benz SL63 AMG for two-piece iron rotors that bolt on with no modifications. The factory calipers carry straight over, so brake bias and ABS efficiency stay where Mercedes-AMG set them. Each ring is GiroDisc’s proprietary cast iron, poured in the USA and machined in-house, floating on a 6061-T6 aluminum hat through 10 cadmium-plated drive pins. It is a sensible choice for an SL63 owner who wants iron rear rotors that can be re-ringed as they wear.

Bolt-On and Go

No spacers, brackets or machining are involved: the ceramic disc comes off, the GiroDisc assembly bolts to the hub, and the original caliper goes back on. Each rotor is labeled for its side because the curved vanes are handed. The cap screws can look loose by design and are never tightened beyond 60 in-lb, or 7 Nm, which preserves the float the design depends on.

Features

Direct replacement for the factory carbon ceramic rear disc, no modifications
Keeps the original rear calipers, brake bias and ABS efficiency
10 cadmium-plated alloy steel drive pins made by GiroDisc
Strictly US-sourced 6061-T6 aluminum hat
Curved vanes that pump air through the disc
Anti-noise spring washers for quiet running when cold

What’s Included

Rear rotor assemblies (L/R)

Applications

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

Notes

The GiroDisc 358mm Rear Iron Rotor Conversion suits SL63 cars that left the factory with carbon ceramic brakes
Worn rings are renewed with the GiroDisc Mercedes 358mm rear replacement rings, which bolt to these hats
Rotors are handed and labeled for the left or right side of the car
Stock photography may not depict the actual product

Frequently Asked Questions

Is the GiroDisc 358mm Rear Iron Rotor Conversion a bolt-on part for the SL63? Yes. GiroDisc describes the GiroDisc 358mm Rear Iron Rotor Conversion as a direct replacement for the factory disc with no modifications needed. It bolts to the car and works with the original calipers, keeping the factory brake bias and ABS efficiency.
Why move an SL63 from ceramic to iron rear rotors? Iron rings are straightforward to renew. Once these rotors are fitted, only the rings are replaced as they wear, with the aluminum hats staying on the car. That suits owners who drive hard and want a serviceable rear rotor instead of a ceramic replacement.
How does the SL63 rear rotor manage heat on track? Curved vanes cast into the ring work as a centrifugal pump, pulling air from the hub and pushing it out through the disc. The floating mount also lets the ring expand freely with heat instead of distorting against a rigid hat during long sessions.
What holds the ring to the hat on this rear rotor? Ten high-strength alloy steel drive pins, made by GiroDisc in the USA and cadmium plated for corrosion resistance. Class 12.9 cap screws with hardened washers secure the pins, and spring washers on the rotor side stop the ring from rattling when cold.
Which rings rebuild these SL63 rear hats? The matching rings are GiroDisc part number D2-207, the Mercedes 358mm rear replacement rings, sold in pairs with fresh hardware. Replace the rings at the minimum thickness marked on the hat and ring edge, or as soon as a crack reaches the edge.

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 358mm Rear Iron Rotor Conversion for R231 Mercedes-Benz SL63 AMG [A2-207]

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GiroDisc 358mm Rear Iron Rotor Conversion for R231 Mercedes-Benz SL63 AMG

Bolt-On and Go

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews