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GiroDisc slotted 2-piece front rotors for the 2003-2024 Mercedes-Benz GT, C63, CLK63 Black Series, CLS55, CLS63, E55, E550, E63, SL55, SL63, SLK55. Each rotor pairs a slotted iron ring with a lightweight aluminum hat, so it runs cooler and weighs less than a one-piece disc. At about 23.6 lb per rotor against roughly 34.5 lb for the stock part, it trims unsprung and rotating weight at each corner. GiroDisc builds its rotors for drivers who take their cars to the track, and they stay quiet and smooth enough for daily use.
The center hat is machined from US-sourced 6061-T6 aircraft-grade aluminum. The ring is GiroDisc's own proprietary cast iron, poured in the USA and machined start to finish in GiroDisc's shop. A curved vane design developed in racing works as a centrifugal pump, forcing cooling air through the disc to keep temperatures in check through long sessions. Lighter rotors also cut rotating and unsprung weight, which helps acceleration and suspension response.
Ring and hat are joined by 10 high-strength alloy steel drive pins, made by GiroDisc in the USA and cadmium plated for corrosion resistance. The pins carry the braking load while allowing axial and radial float between the hat and the ring. Anti-noise spring washers let the ring grow with heat without the cold rattle typical of floating rotors, and the float lets the ring center itself between the pads.
Because the hat is a separate part, you only replace the iron when it wears out. New GiroDisc rings (D1-308) bolt onto the hats you already have, which costs much less over time than buying complete rotors. Replace the rings when they reach minimum thickness, or sooner if a crack reaches the outer edge.
Two assembled front rotors, one for each side, with each iron ring already mounted to its aluminum hat. Brake pads are not included.
| Part number | A1-308 |
| Brand | GiroDisc |
| Type | 2-piece floating slotted rotor |
| Position | Front |
| Ring size | 360 mm |
| Ring material | Proprietary cast iron, poured in the USA |
| Hat | 6061-T6 aluminum |
| Drive pins | 10, alloy steel, cadmium plated |
| Weight | 23.6 lb per rotor (stock about 34.5 lb) |
| Replacement rings | D1-308 |
| Sold as | Two rotors, one left and one right |
| Shipping dimensions | 16.3 x 16.2 x 7.4 in (41.4 x 41.1 x 18.8 cm) |
| Shipping weight | 54 lb (24.5 kg) |
Some listings depend on the factory brake package or trim, so check the notes in the Model column of the fitment table before you order. The product photo is GiroDisc's representative image of its 2-piece rotors.
| Year | Make | Model | Chassis | Engine |
|---|---|---|---|---|
| 2016-2021 | Mercedes-Benz | AMG GT | C190 | 4.0L Twin-Turbo V8 |
| 2019-2024 | Mercedes-Benz | AMG GT 53 4-Door | X290 | 3.0L Turbo I6 Hybrid |
| 2008-2015 | Mercedes-Benz | C63 AMG | W204 | 6.2L V8 (M156) |
| 2015-2021 | Mercedes-Benz | C63 AMG | W205 | 4.0L Twin-Turbo V8 |
| 2008 | Mercedes-Benz | CLK63 AMG Black Series | C209 | 6.2L V8 (M156) |
| 2006 | Mercedes-Benz | CLS55 AMG (Without P30 package) | W219 | 5.4L Supercharged V8 |
| 2012-2018 | Mercedes-Benz | CLS63 AMG (Without carbon ceramic) | W218 | 5.5L Twin-Turbo V8 |
| 2007-2011 | Mercedes-Benz | CLS63 AMG (Without P30 package) | W219 | 6.2L V8 (M156) |
| 2003-2006 | Mercedes-Benz | E55 AMG | W211 | 5.4L Supercharged V8 |
| 2012-2014 | Mercedes-Benz | E550 | W212 | 4.6L Twin-Turbo V8 |
| 2007-2009 | Mercedes-Benz | E63 AMG | W211 | 6.2L V8 (M156) |
| 2010-2016 | Mercedes-Benz | E63 AMG (Without carbon ceramic) | W212 | 6.2L V8, 5.5L Twin-Turbo V8 |
| 2003-2008 | Mercedes-Benz | SL55 AMG (2003-08 without P30 package) | R230 | 5.4L Supercharged V8 |
| 2009-2011 | Mercedes-Benz | SL63 AMG (Without P30 package) | R230 | 6.2L V8 (M156) |
| 2012-2016 | Mercedes-Benz | SLK55 AMG | R172 | 5.5L V8 |
| Year | Make | Model |
|---|
Not sure? Text us your VIN and we’ll confirm.
Shipping: Orders ship via UPS, FedEx or USPS, from our facility near Los Angeles or directly from the manufacturer. Rates for many items are weight-based and shown at checkout. If you need it by a certain date, text us before you order.
Returns: Unused items in brand-new condition and original packaging can be returned within 30 days of the invoice date, with a 25% restocking fee unless otherwise specified. In some cases we can offer a lower fee with the balance as store credit. Shipping charges aren't refundable in either direction unless approved by AutoTalent.
Not returnable: special-order or custom items, and anything that has been installed, modified or altered.
Cancellations: free if the item is out of stock or we miss the ETA you agreed to. Other cancellations carry a 5% processing fee to cover card fees we can't recover. Special-order items can't be cancelled.
Damaged in transit? Report it to the carrier and to us within 48 hours, keep all packaging, and don't send anything back without our written approval.
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