Do the GiroDisc Front Rotors for 982 fit a GT4 RS with PCCB?

No. GiroDisc lists the GiroDisc Front Rotors for 982 as a direct replacement for the 718 Cayman GT4 RS with the factory iron brake system. Cars equipped with Porsche Ceramic Composite Brakes are not covered by this part number. Check before ordering.

What are the dimensions of the GT4 RS front rotor?

GiroDisc gives a diameter of 408mm and a thickness of 36mm, with a weight of around 29 lb per rotor assembly. The rings carry 72 curved vanes and are replaced once they wear to 34mm, the minimum thickness GiroDisc recommends.

When do the GT4 RS front rings need replacing?

GiroDisc recommends replacing the rings at 34mm, down from 36mm new, and also if a crack leads to the edge of the ring. The replacement part is the D1-291 ring pair, which bolts to the existing anodized hats with new hardware.

Are the GiroDisc hats on the GT4 RS made in the USA?

Yes. GiroDisc manufactures all major components in-house at its facility in Bellingham, Washington, from domestically sourced materials. The hats are machined from 6061-T6 aluminum and finished in black anodize, and the drive pins and rings come from the same facility.

Will the GT4 RS front rotors rattle on the street?

No. GiroDisc assembles every rotor with spring clips and Belleville washers. They give the ring the float it needs under race heat while holding it quietly at road speeds, so there is no noise from loose hardware when the car is driven to and from the track.

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Description

GiroDisc Front Rotors for 982 Porsche 718 Cayman GT4 RS

GiroDisc’s Front Rotors for 982 Porsche 718 Cayman GT4 RS replace the factory iron front discs with a 408mm by 36mm two-piece floating assembly weighing around 29 lb, according to GiroDisc. The rings are machined from GiroDisc’s proprietary high-carbon iron casting, the hats from black anodized 6061-T6 aluminum, and every major component is made in-house in Bellingham, Washington. It is a direct replacement for GT4 RS cars on the standard iron brakes. An owner who uses the GT4 RS as Porsche intended, on track, gets reusable hats and rings priced to be replaced.

Design and Performance

Seventy-two curved vanes in each ring act as a centrifugal pump, pulling air in through the hub to cool the disc under hard use. The GiroDisc Front Rotors for 982 are assembled with spring clips and Belleville washers, so the ring floats as it should on track without noise from loose hardware on the road. High-strength steel alloy drive pins, cadmium plated, join each ring to its hat.

Features

408mm diameter and 36mm thickness
Around 29 lb per rotor assembly
72 curved cooling vanes
Black anodized 6061-T6 aluminum hat
Spring clips and Belleville washers for quiet float
Direct replacement for the factory iron front rotors

Specifications

Outer diameter: 408mm
Thickness: 36mm
Minimum ring thickness: 34mm
Weight: about 29 lb per rotor assembly
Cooling vanes: 72 curved

What’s Included

Front rotor assemblies (L/R)

Applications

Porsche 718 Cayman GT4 RS: 982 | with factory iron brakes | 4.0L flat-six

Notes

Cars with PCCB are not covered; this rotor replaces the factory iron front brakes only
Worn rings are renewed with the GiroDisc GT4 RS 408x36mm front replacement rings on these hats
The rear axle is covered by the GiroDisc 992 GT3 and GT4 RS rear rotors
Stock photography may not depict the actual product

Frequently Asked Questions

Do the GiroDisc Front Rotors for 982 fit a GT4 RS with PCCB? No. GiroDisc lists the GiroDisc Front Rotors for 982 as a direct replacement for the 718 Cayman GT4 RS with the factory iron brake system. Cars equipped with Porsche Ceramic Composite Brakes are not covered by this part number. Check before ordering.
What are the dimensions of the GT4 RS front rotor? GiroDisc gives a diameter of 408mm and a thickness of 36mm, with a weight of around 29 lb per rotor assembly. The rings carry 72 curved vanes and are replaced once they wear to 34mm, the minimum thickness GiroDisc recommends.
When do the GT4 RS front rings need replacing? GiroDisc recommends replacing the rings at 34mm, down from 36mm new, and also if a crack leads to the edge of the ring. The replacement part is the D1-291 ring pair, which bolts to the existing anodized hats with new hardware.
Are the GiroDisc hats on the GT4 RS made in the USA? Yes. GiroDisc manufactures all major components in-house at its facility in Bellingham, Washington, from domestically sourced materials. The hats are machined from 6061-T6 aluminum and finished in black anodize, and the drive pins and rings come from the same facility.
Will the GT4 RS front rotors rattle on the street? No. GiroDisc assembles every rotor with spring clips and Belleville washers. They give the ring the float it needs under race heat while holding it quietly at road speeds, so there is no noise from loose hardware when the car is driven to and from the track.

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 982 Porsche 718 Cayman GT4 RS [A1-291]

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GiroDisc Front Rotors for 982 Porsche 718 Cayman GT4 RS

Design and Performance

Features

Specifications

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews