Brembo Caliper, Left, P4 34/38mm, without Pads, Billet Monobloc, 108mm Radial Mount, for use w/ Narrow Band Disc, Front, Nickel - XA3J7F0

Brembo Left Caliper P4 34/38mm – Billet Monobloc, 108mm Radial Mount, Nickel | XA3J7F0

Brembo XA3J7F0 Left-Hand Monobloc Caliper. Billet Nickel finish, 108mm radial mount, $34/38\text{mm}$ piston setup. For narrow band discs. Ultimate racing performance.

The Brembo Racing XA3J7F0 is a premium left-hand front brake caliper, engineered for the most demanding racing applications. This caliper represents the pinnacle of Brembo's monobloc technology, starting its life as a single block of high-grade aluminum billet. The billet monobloc construction guarantees exceptional rigidity and unparalleled braking consistency under extreme thermal and mechanical stress, translating to superior feel and less fade on the track.¹

Finished with a distinctive and durable Nickel coating, this caliper not only offers corrosion resistance but also signifies its elite racing pedigree. It features a sophisticated differential piston setup of ²$34\text{mm}$ and ³$38\text{mm}$, specifically calibrated to provide optimal braking force distribution and precise modulation.⁴ The 108mm radial mounting standard ensures broad compatibility with modern superbikes and performance-oriented chassis.

Crucially, the XA3J7F0 is designed for use with narrow band brake discs, offering specialized fitment for high-performance setups where rotor weight is a key consideration.⁵ This caliper is supplied without brake pads, allowing the professional racer or tuner to select the ideal compound for their specific track conditions and discipline.⁶

Best Uses

1.       World Superbike (WSBK) / Moto2 / Professional Road Racing: Designed and manufactured exclusively for top-tier racing competitions.

2.       High-End Track Day Use: For experienced riders seeking maximum performance, consistency, and feel.

3.       Performance Upgrade: For motorcycles with 108mm radial mount forks, requiring an extreme reduction in unsprung weight and a significant increase in braking power.

4.       Use with Racing Discs: Optimally paired with high-performance, narrow-band, 30mm thickness brake discs.

Features

1. Billet Aluminum Monobloc Construction: Machined from a single block of high-grade aluminum, eliminating flex for maximum rigidity and consistent pedal feel.⁷
2. Differential Piston Set-up ($34\text{mm}/38\text{mm}$): Utilizes two different piston diameters to ensure optimized pressure distribution across the pad surface for enhanced performance and wear.
3. 108mm Radial Mount: Standard racing fitment for modern sportbikes, providing superior stability and precision alignment compared to axial mounts.
4. Nickel Surface Finish: A high-performance, durable surface treatment that offers superior resistance to heat and corrosion while lending a distinctive, factory racing look.
5. Optimized for Narrow Band Discs: Specifically engineered clearance and design to integrate perfectly with high-performance, narrow-friction-surface brake rotors.

Benefits

1. Unmatched Braking Consistency: The monobloc design virtually eliminates caliper deformation, ensuring repeatable and reliable braking performance from the first lap to the last.
2. Superior Rider Feedback: High rigidity translates directly into a precise and firm feel at the lever, allowing the rider to modulate braking force with greater confidence and control.
3. Reduced Unsprung Weight: The billet machining process and optimization for narrow discs contribute to a lighter overall braking system, improving handling and suspension responsiveness.
4. Professional-Grade Durability: The robust billet construction and Nickel plating ensure the caliper withstands the harsh environment of competitive racing, offering long-term reliability.
5. Easy Pad Selection Customization: Supplied without pads, giving the end-user the flexibility to choose the exact racing pad compound (sintered, carbon-ceramic, etc.) best suited for their specific racing application.