Are the GiroDisc Front Rotors for McLaren 620R made in the USA?

Yes. GiroDisc casts the rings from its proprietary high-carbon iron in the USA and machines them in-house in Bellingham, Washington. The drive pins are also made by GiroDisc, and the hats are 6061-T6 aircraft-specification aluminum, so the Front Rotors for McLaren 620R are an American-built assembly.

What does a floating front rotor do for a 620R on track?

The iron ring can expand with heat independently of the aluminum hat, so it stays flat rather than distorting through repeated heavy stops. Drive pins hold it centered, and the curved vanes keep air moving through the ring to control temperature during a long session.

Does GiroDisc offer drilled versions of this rotor?

No. GiroDisc does not recommend drilled discs for performance driving because the holes can lead to cracking under heavy heat cycles. Its rotors use slots instead, which clean the friction surface and prevent a film of water from forming in wet conditions.

How do I know when the front rings are worn?

GiroDisc marks the minimum thickness on the hat and on the edge of the ring. Measure the ring at several points, and replace it once it reaches that figure or if a crack runs out to the edge of the ring.

Should the new rotors be bedded in before a track day?

Yes. GiroDisc recommends a bed-in procedure for every new set of discs. Bedding conditions the fresh iron so braking is smooth and consistent, and it is best done on the road or an open paddock area before the first timed session.

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Description

GiroDisc Front Rotors for McLaren 620R

GiroDisc’s Front Rotors for McLaren 620R give the car a two-piece, fully floating iron front brake made in America. The ring is cast from GiroDisc’s proprietary high-carbon iron, poured in the USA and machined in-house in Bellingham, Washington, then floated on a hat of 6061-T6 aircraft-specification aluminum. Curved vanes inside the ring act as a centrifugal pump, pulling air in at the hub and pushing it out through the disc. For a 620R owner who takes the car on circuit, this is a durable and serviceable front rotor.

Design and Performance

Drive pins of high-strength alloy steel, made by GiroDisc and cadmium plated, carry the braking load while letting the ring float on the hat. Class 12.9 cap screws with hardened washers secure the pins, and anti-noise spring washers let the ring grow with heat yet stay quiet when cold. A slotted face keeps the friction surface clean and sheds water on a wet track.

Features

Two-piece, fully floating construction
6061-T6 aircraft-specification aluminum hat
Proprietary high-carbon iron ring cast in the USA
Curved vanes that pump air from hub to rim
Cadmium-plated alloy steel drive pins with anti-noise spring washers
Slotted face to clean the friction surface

What’s Included

Front rotor assemblies (L/R)

Applications

McLaren 620R: Front axle

Notes

The Front Rotors for McLaren 620R are left and right handed and labeled for position
The GiroDisc McLaren 620R rear rotors are the matching rear set
Cap screws can look loose by design and are never tightened beyond 60 in-lb (7 Nm)
Stock photography may not depict the actual product

Frequently Asked Questions

Are the GiroDisc Front Rotors for McLaren 620R made in the USA? Yes. GiroDisc casts the rings from its proprietary high-carbon iron in the USA and machines them in-house in Bellingham, Washington. The drive pins are also made by GiroDisc, and the hats are 6061-T6 aircraft-specification aluminum, so the Front Rotors for McLaren 620R are an American-built assembly.
What does a floating front rotor do for a 620R on track? The iron ring can expand with heat independently of the aluminum hat, so it stays flat rather than distorting through repeated heavy stops. Drive pins hold it centered, and the curved vanes keep air moving through the ring to control temperature during a long session.
Does GiroDisc offer drilled versions of this rotor? No. GiroDisc does not recommend drilled discs for performance driving because the holes can lead to cracking under heavy heat cycles. Its rotors use slots instead, which clean the friction surface and prevent a film of water from forming in wet conditions.
How do I know when the front rings are worn? GiroDisc marks the minimum thickness on the hat and on the edge of the ring. Measure the ring at several points, and replace it once it reaches that figure or if a crack runs out to the edge of the ring.
Should the new rotors be bedded in before a track day? Yes. GiroDisc recommends a bed-in procedure for every new set of discs. Bedding conditions the fresh iron so braking is smooth and consistent, and it is best done on the road or an open paddock area before the first timed session.

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 Front Rotors for McLaren 620R [A1-264]

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GiroDisc Front Rotors for McLaren 620R

Design and Performance

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews