What size are the conversion rear rings?

GiroDisc lists the rotor outer diameter for these rings as 360mm. They have curved internal vanes and a slotted face, and they come as a left and right pair with the hardware needed to mount them to the existing aluminum hats.

Can the rings bolt to the original ceramic disc hats?

No. GiroDisc rings are designed only for GiroDisc hats. Factory two-piece hats from the ceramic system and hats from other brands use different mounting details, so the A2-209 conversion must already be on the vehicle. Order that rear conversion first.

How does the cost compare with new ceramic discs?

A pair of iron rings with hardware costs far less than a set of replacement carbon-ceramic discs, and the aluminum hats are reused indefinitely. That difference is the main reason owners convert in the first place. New hardware is always included.

When should the rear rings be changed?

At the minimum thickness marked on the hat and ring edge, or immediately if a crack has reached the outer edge of a ring. Light heat checking across the friction face alone is normal after track use and is not a reason to replace them.

Description

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BP PRICING DIFFERENCE

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Description

GiroDisc Iron Conversion Rear Replacement Rings for Alfa Romeo Giulia and Stelvio Quadrifoglio

GiroDisc’s Iron Conversion Rear Replacement Rings are the service part for the A2-209 rear conversion on carbon-ceramic Giulia and Stelvio Quadrifoglio models. Each 360mm ring is cast from GiroDisc’s high-carbon iron, poured in the USA, and the pair ships with new mounting hardware for the hats already on the vehicle. Owners who converted to iron to escape ceramic replacement costs will find this is where the economy shows.

Fitment and Installation

The rings fit GiroDisc A2-209 rear hats only and are not designed for factory ceramic disc hats or other brands. With the rotors off, unbolt the worn rings, fit the new pair on their marked sides with the supplied hardware, and torque the cap screws to 60 in-lb or less.

Features

360mm rotor outer diameter
Curved internal cooling vanes
Slotted friction face
Replacement mounting hardware included
Machined in-house in Bellingham, Washington
Sold as a left and right pair

What’s Included

Rear replacement rings (L/R)
Replacement mounting hardware

Applications

Alfa Romeo Giulia Quadrifoglio: with GiroDisc A2-209 rear conversion
Alfa Romeo Stelvio Quadrifoglio: with GiroDisc A2-209 rear conversion

Notes

These rings fit the hats of the GiroDisc Quadrifoglio rear iron rotor conversion only
Hats are not included; the Iron Conversion Rear Replacement Rings reuse the existing GiroDisc hats
Iron-braked Quadrifoglio models use a different GiroDisc rear ring
Minimum thickness is marked on the hat and the ring edge
Stock photography may not depict the actual product

Frequently Asked Questions

Do the Iron Conversion Rear Replacement Rings fit factory iron-braked vehicles? No. The GiroDisc Iron Conversion Rear Replacement Rings fit only the hats of the A2-209 rear conversion used on carbon-ceramic Giulia and Stelvio Quadrifoglio models. Cars built with iron brakes use a different GiroDisc rotor and ring. Check the rotor part number first.
What size are the conversion rear rings? GiroDisc lists the rotor outer diameter for these rings as 360mm. They have curved internal vanes and a slotted face, and they come as a left and right pair with the hardware needed to mount them to the existing aluminum hats.
Can the rings bolt to the original ceramic disc hats? No. GiroDisc rings are designed only for GiroDisc hats. Factory two-piece hats from the ceramic system and hats from other brands use different mounting details, so the A2-209 conversion must already be on the vehicle. Order that rear conversion first.
How does the cost compare with new ceramic discs? A pair of iron rings with hardware costs far less than a set of replacement carbon-ceramic discs, and the aluminum hats are reused indefinitely. That difference is the main reason owners convert in the first place. New hardware is always included.
When should the rear rings be changed? At the minimum thickness marked on the hat and ring edge, or immediately if a crack has reached the outer edge of a ring. Light heat checking across the friction face alone is normal after track use and is not a reason to replace them.

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 Iron Conversion Rear Replacement Rings for Alfa Romeo Giulia and Stelvio Quadrifoglio [D2-209]

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GiroDisc Iron Conversion Rear Replacement Rings for Alfa Romeo Giulia and Stelvio Quadrifoglio

Fitment and Installation

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews