About the Product

Brembo GP4-MS High Performance Front Brake Caliper

CNC Billet Monobloc | 108mm Radial Mount | Nickel Finish | Right Side Caliper

Part Number: 120D60040

The Brembo GP4-MS 120D60040 is an elite-level MotoGP-derived right-side radial brake caliper engineered for riders demanding uncompromising braking performance, exceptional thermal stability, and race-level hydraulic precision. Manufactured from a solid billet of aluminum using advanced CNC machining and monobloc construction technology, the GP4-MS delivers extraordinary rigidity, lightweight performance, and braking consistency for aggressive street and track riding.

Finished in Brembo’s distinctive nickel-plated racing surface with integrated cooling fins and advanced MotoGP-inspired architecture, the GP4-MS represents one of Brembo’s most technologically advanced road-use brake calipers ever produced.

Item Summary

• Genuine Brembo GP4-MS front brake caliper
• Brembo Part Number: 120D60040
• RIGHT side caliper
• CNC billet aluminum monobloc construction
• 108mm radial mount spacing
• 4 × 30mm aluminum pistons
• Nickel-plated MotoGP-style finish
• Integrated ventilation cooling fins
• MotoGP-derived braking technology
• Lightweight high-rigidity design
• Brembo brake pads included
• Compatible with 34mm braking band
• Designed for aggressive street and track riding
• Brembo Upgrade Line product
• Manufactured in Italy

MotoGP-Derived Brembo Engineering

The Brembo GP4-MS was developed directly from the monobloc brake calipers used in MotoGP competition and adapted specifically for high-performance road and track motorcycles. Brembo combines monobloc architecture with machining from solid billet aluminum to maximize rigidity, thermal resistance, and braking precision.

Compared to conventional cast calipers, billet monobloc construction allows Brembo to utilize aluminum with superior mechanical characteristics and greater resistance to high operating temperatures. The result is exceptional braking consistency and rider confidence during extreme braking conditions.

Benefits Include

• Improved braking consistency
• Sharper lever feel
• Enhanced modulation
• Superior thermal stability
• Reduced caliper flex under load

CNC Billet Monobloc Construction

Unlike conventional two-piece calipers, the GP4-MS uses a single-piece monobloc body precision-machined from solid billet aluminum. This dramatically improves structural rigidity while reducing deformation during aggressive braking.

Construction Advantages

• Exceptional rigidity
• Reduced unsprung weight
• Improved braking precision
• Better heat resistance
• Enhanced hydraulic consistency

The monobloc billet structure allows the GP4-MS to achieve braking performance approaching Brembo’s professional racing calipers used in MotoGP and World Superbike competition.

Advanced 30mm Piston Configuration

The GP4-MS utilizes four 30mm pistons engineered to maximize braking power while maintaining excellent modulation and controllability. Brembo specifically states the GP4-MS “rewrites the rules for road-use calipers” by delivering braking performance close to competition-level systems.

Performance Benefits

• Exceptional stopping power
• Progressive lever feel
• Improved rider feedback
• Consistent braking performance
• Outstanding thermal stability

The aluminum pistons are optimized for repeated heavy braking cycles during aggressive road and track riding.

Integrated Cooling Fin Technology

One of the defining features of the GP4-MS is the use of integrated external cooling fins built directly into the caliper body. Brembo designed these ventilation fins to improve airflow and thermal exchange during operation.

Cooling Benefits

• Improved heat dissipation
• Reduced brake fade
• More stable braking performance
• Increased thermal efficiency
• Improved performance during extended track sessions

Premium Nickel Racing Finish

The GP4-MS features Brembo’s premium nickel-plated finish inspired directly by MotoGP racing hardware. Brembo states the nickel surface treatment improves manufacturing precision while also enhancing corrosion resistance and durability.

Finish Benefits

• Premium MotoGP appearance
• Enhanced corrosion resistance
• Improved durability
• High-end factory superbike aesthetics

Technical Specifications

Included In The Box

• Brembo GP4-MS right-side caliper
• Brembo brake pads
• Brembo installation documentation
• Brembo racing packaging

Key Features

CNC Billet Monobloc Construction

Single-piece billet body delivers exceptional rigidity and race-level braking precision.

MotoGP-Derived Brembo Technology

Developed directly from Brembo’s MotoGP racing experience.

Integrated Cooling Fins

Advanced ventilation fins improve thermal exchange and braking consistency.

Premium Nickel Finish

MotoGP-inspired nickel-plated coating creates authentic factory racing appearance.

Race-Level Modulation

Four 30mm pistons provide exceptional braking control and rider feedback.

Compatible Brake Pads & Spare Parts

Genuine Brembo Compatible Pads

Replacement Components

Matching Caliper

The complete GP4-MS left/right caliper kit is sold under Brembo part number 220D60030.

Recommended Supporting Components

Recommended Brembo Master Cylinders

For optimal hydraulic leverage and braking performance, Brembo commonly recommends:

• Brembo 17RCS
• Brembo 19RCS
• Brembo RCS Corsa Corta
• Brembo 19x16 (track use)

Recommended Brake Rotors

Compatible with:

• Brembo T-Drive rotors
• Brembo Serie Oro rotors
• Brembo Racing SuperSport rotors
• High-performance OEM rotors

Designed for motorcycles utilizing 34mm braking band height and approximately 5.5mm rotor thickness.

Important Fitment Notes

• Designed for motorcycles utilizing 108mm radial mount spacing
• RIGHT side caliper only
• Compatible with 34mm braking band height
• Some applications may require spacers and longer mounting bolts
• Professional installation strongly recommended
• Brake system must be properly bled after installation
• ABS compatibility varies by motorcycle application

Why Choose the Brembo GP4-MS 120D60040?

The Brembo GP4-MS represents one of the closest braking systems available to true MotoGP technology for road motorcycles. Combining billet monobloc construction, advanced cooling fin technology, premium nickel finish, and exceptional hydraulic precision, the GP4-MS delivers elite-level braking performance for riders demanding the very best.

Key Advantages

• MotoGP-derived Brembo technology
• CNC billet monobloc construction
• Integrated cooling fin system
• Exceptional braking precision
• Outstanding thermal stability
• Premium nickel racing finish
• Lightweight high-performance design
• Genuine Italian Brembo engineering

For riders building the ultimate superbike braking system or upgrading to one of Brembo’s most advanced MotoGP-inspired calipers, the Brembo GP4-MS 120D60040 delivers uncompromising braking performance with unmistakable factory racing pedigree. 

Click here to view the complete 2012 Brembo Motorcycle Brakes catalog.