Brembo Front UPGRADE GT-R Big Brake Kit for G8x BMW M4
$9,995.00
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A high-performance front brake upgrade for the G8x BMW M4, delivering stronger stopping power, improved heat management, and consistent, fade-resistant braking with Brembo GT-R engineering.
Brembo Front UPGRADE GT-R Big Brake Kit for G8x BMW M4
The Brembo Front UPGRADE GT-R Big Brake Kit for the G8x BMW M4 is engineered to deliver a significant boost in front-end braking performance, offering superior stopping power, improved pedal feel, and enhanced heat management. Featuring Brembo’s billet-machined 6-piston fixed calipers paired with large two-piece floating rotors, this complete system provides consistent, fade-resistant braking for spirited street driving or track use. Designed as a vehicle-specific, bolt-on upgrade, the GT-R front kit integrates seamlessly with the G8x M4 chassis and combines motorsport-derived engineering, precision craftsmanship, and durable components to provide confident, repeatable braking performance under demanding conditions.
UPGRADE GT System
Brembo’s UPGRADE GT Systems deliver a complete, vehicle‑specific braking solution engineered to work seamlessly with the factory master cylinder and ABS for unmatched balance, performance, and safety. Each kit is designed by Brembo for optimal hydraulic compatibility and braking distribution, ensuring confident pedal feel and consistent stopping power in both street and track environments. Offering a significant step above OE performance, UPGRADE GT Systems provide improved heat management, fade resistance, and durability without compromising everyday drivability.
Features
6-piston billet monobloc calipers
405mm x 34mm (15.9″) 2-piece disc
Complete axle kit
Nickle plated calipers
Pre-Assembled kit
All hardware included
Specifications
Disc Diameter: 405mm
Disc Width: 34mm
Disc Air Gap: 12mm
Disc Annulus: 62mm
Disc Construction: 2-piece disc
Disc Vane Design: Vented curved 48 vane
Applications
BMW M4: G82, G83 | 2020-present
About Brembo
Brembo is a global leader in disc braking systems, headquartered in Italy with production in sixteen countries and commercial branches across Europe, supplying products to about seventy nations. Its 7,000-plus workforce includes a large contingent of engineers dedicated to research and development, reflecting a deep commitment to innovation. The Brembo High Performance program derives from decades of supercar OEM engineering and more than 200 world championships across Formula 1, WRC, NASCAR, IndyCar, ALMS, Grand-Am, Speed World Challenge, and FIA GT. Working directly with over 30 automakers—including Ferrari, Porsche, Lamborghini, BMW, Mercedes-Benz, Audi, GM, Ford, Jaguar, Land Rover, Lexus, Honda, Nissan, Subaru, and more—Brembo develops vehicle-specific braking solutions. Vertical integration with in-house foundries provides metallurgical expertise and tight control of the production cycle. R&D is matched by rigorous validation, from static and comfort evaluations to road trials and dynamic bench testing. Manufacturing meets ISO 9004 quality and ISO 14000 environmental standards. Guided by a strategy of locating facilities near client plants and investing in emerging markets, Brembo accelerates supply, deepens collaboration, and continually advances braking performance and reliability.
Additional Information
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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
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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
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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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