Do the GiroDisc Ferrari 328 front rotors require any modifications?

No. The GiroDisc Ferrari 328 front rotors bolt directly to the car and work with the OE calipers and OE brake pads without any modifications, pad changes, or additional hardware. Factory brake bias and ABS efficiency are fully preserved.

How much lighter are the GiroDisc Ferrari 328 front rotors compared to OEM?

The GiroDisc Ferrari 328 front rotors are approximately 3-5 lbs lighter per rotor than the factory cast iron units. That weight reduction at the front axle reduces unsprung and rotating mass, improving acceleration response out of corners, suspension compliance, and braking consistency across repeated stops.

Do the GiroDisc Ferrari 328 front rotors fit the Mondial as well?

Yes. The GiroDisc Ferrari 328 front rotors (A1-070) are confirmed fitment for the Ferrari 328 GTB, 328 GTS, Mondial 3.2, and Mondial t across the 1985-1993 production run.

Why choose a 2-piece rotor over a big brake kit for the Ferrari 328?

A big brake kit changes the front brake bias, requiring recalibration of the rear braking and ABS system. The GiroDisc Ferrari 328 front rotors are a direct OE replacement that preserves factory bias — delivering the weight and performance benefits of a 2-piece rotor without disrupting the car's precisely calibrated braking balance.

What happens when the GiroDisc Ferrari 328 front rotor rings wear out?

Only the rings need replacing — not the full assembly. Replacement rings (D1-070) bolt onto the existing reusable 6061-T6 aluminum hat, making ongoing maintenance significantly more cost-effective than replacing full single-piece rotors.

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Description

GiroDisc 2-Piece Front Rotors for Ferrari 328 GTB, 328 GTS, and Mondial

Ferrari 328 front rotors from GiroDisc are a 2-piece, fully floating direct OE replacement for the Ferrari 328 GTB, 328 GTS, and Mondial, engineered to reduce unsprung weight and rotating mass at the front axle while delivering consistent, high-performance braking with no modifications required. The GiroDisc Ferrari 328 front rotors bolt directly to the car and work with OE calipers and OE pads without any changes no pad swap, no bracket modification, no additional hardware. At approximately 3-5lbs lighter per rotor than the stock cast iron units, the GiroDisc Ferrari 328 front rotors deliver a meaningful reduction in unsprung and rotating mass, improving acceleration response, suspension compliance, and braking consistency in a single upgrade.

Why Upgrade to GiroDisc Ferrari 328 Front Rotors?

Upgrading to lightweight 2-piece rotors rather than a big brake kit preserves the factory brake bias and ABS efficiency, both calibrated precisely for the 328 and Mondial’s weight distribution and driving character. The GiroDisc Ferrari 328 front rotors reduce rotating and unsprung weight by approximately 3-5lbs per corner, which translates directly to improved throttle response out of corners, more responsive suspension reaction to road inputs, and more consistent braking as the lighter rotors manage heat more evenly across repeated stops. The GiroDisc Ferrari 328 front rotors are machined from a proprietary high-carbon iron casting to GiroDisc’s own metallurgical specification, with a curved vane design developed in racing to act as a centrifugal pump forcing cooling air through the disc. The 2-piece fully floating design uses 10 high-strength alloy steel drive pins manufactured in-house and cadmium-plated for long-term corrosion resistance that take the braking load while maintaining axial and radial float between the hat and disc. Anti-noise spring washers allow the rotor to expand under heat while eliminating the rattle associated with floating rotors; the float also allows the rotor to self-center between the pads.

Ferrari 328 Front Rotors: Construction and Materials

The central hat section of the GiroDisc Ferrari 328 front rotors is machined from 6061-T6 aircraft-specification aluminum sourced in the USA, finished in black anodize. The disc is made from GiroDisc’s own proprietary cast iron, poured in the USA and machined from start to finish in-house at GiroDisc’s Bellingham, WA facility. Drive pins are class 12.9 cap-screwed with hardened washers and cadmium-plated high-strength alloy steel. When the disc wears out, only the ring needs replacing; the aluminum hat is reusable. Replacement rings are available separately (D1-070).

Features

Direct OE replacement bolts to the car with no modifications required
Works with OE calipers and OE brake pads no pad change needed
Approximately 3-5lbs lighter per rotor than OEM cast iron units
Preserves factory brake bias and ABS efficiency
2-piece fully floating design with 10 high-strength alloy steel drive pins
Proprietary high-carbon iron rings poured and machined in-house in the USA
Curved vane design acts as a centrifugal pump for active cooling
Anti-noise spring washers eliminate rattle; rotor self-centers between pads
Reusable 6061-T6 aluminum hat black anodized finish
Drive pins cadmium-plated for long-term corrosion resistance
Replacement rings available separately (D1-070)

Applications

Ferrari 328 GTB: 328 | 1985-1989
Ferrari 328 GTS: 328 | 1985-1989
Ferrari Mondial 3.2: Mondial | 1985-1989
Ferrari Mondial t: Mondial | 1989-1993

Notes

Sold and priced per pair
Direct OE replacement no modifications required. Works with factory calipers and factory brake pads.
Replacement rings available separately (D1-070)
Stock photography may not depict actual product

Frequently Asked Questions

Do the GiroDisc Ferrari 328 front rotors require any modifications? No. The GiroDisc Ferrari 328 front rotors bolt directly to the car and work with the OE calipers and OE brake pads without any modifications, pad changes, or additional hardware. Factory brake bias and ABS efficiency are fully preserved.
How much lighter are the GiroDisc Ferrari 328 front rotors compared to OEM? The GiroDisc Ferrari 328 front rotors are approximately 3-5lbs lighter per rotor than the factory cast iron units. That weight reduction at the front axle reduces unsprung and rotating mass, improving acceleration response out of corners, suspension compliance, and braking consistency across repeated stops.
Do the GiroDisc Ferrari 328 front rotors fit the Mondial as well? Yes. The GiroDisc Ferrari 328 front rotors (A1-070) are confirmed fitment for the Ferrari 328 GTB, 328 GTS, Mondial 3.2, and Mondial t across the 1985-1993 production run.
Why choose a 2-piece rotor over a big brake kit for the Ferrari 328? A big brake kit changes the front brake bias, requiring recalibration of the rear braking and ABS system. The GiroDisc Ferrari 328 front rotors are a direct OE replacement that preserves factory bias delivering the weight and performance benefits of a 2-piece rotor without disrupting the car’s precisely calibrated braking balance.
What happens when the GiroDisc Ferrari 328 front rotor rings wear out? Only the rings need replacing not the full assembly. Replacement rings (D1-070) bolt onto the existing reusable 6061-T6 aluminum hat, making ongoing maintenance significantly more cost-effective than replacing full single-piece rotors.

About GiroDisc

GiroDisc is a USA-based brake rotor specialist designing, manufacturing, and selling 2-piece fully floating brake rotors for performance road and track applications. All major components are produced in-house at their facility in Bellingham, Washington from domestically sourced materials hats, rings, and drive pins all made under one roof to GiroDisc’s own specifications. Their rotors are engineered for drivers who demand race-ready performance with the everyday usability and serviceability that street-driven cars require.

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 2-Piece Front Rotors for Ferrari 328 GTB, 328 GTS, and Mondial [A1-070]

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GiroDisc 2-Piece Front Rotors for Ferrari 328 GTB, 328 GTS, and Mondial

Why Upgrade to GiroDisc Ferrari 328 Front Rotors?

Ferrari 328 Front Rotors: Construction and Materials

Features

Applications

Notes

Frequently Asked Questions

About GiroDisc

Reviews