Brembo GT-1Q-9621A Front 8-Piston Cast Monobloc Big Brake Kit 412x38mm 2-Piece Disc

The Brembo GT-1Q-9621A is a front axle big brake kit built around an 8-piston cast monobloc caliper paired with massive 412x38mm (16.2") 2-piece cross-drilled discs. Engineered for street, track, and race use, this complete kit ships pre-assembled with all necessary hardware for a straightforward installation.

At the core of the system is a cast monobloc radial-mount caliper with opposed pistons, inner pressure seals, and OEM-approved dust boots. The monobloc construction—machined from a single aluminum casting—delivers exceptional caliper stiffness with minimal flex under load, translating to a more responsive, consistent brake pedal.

The 2-piece disc assembly features an advanced high-carbon alloy iron rotor with corrosion-resistant plating, a curved 48-vane ventilation design for optimized heat dissipation, and a floating H-bobbin with anti-rattle spring mounting system. This floating disc-to-hat interface allows for greater radial and axial movement, reducing heat transfer to the hub and improving thermal durability over repeated hard stops.

Kit Contents & Specifications:

• Caliper Type: 8-Piston Cast Monobloc, Radial Mount
• Piston Seal: Inner Pressure Seal / OEM-Approved Dust Boot
• Disc Diameter: 412mm (16.2")
• Disc Width: 38mm
• Disc Finish: Cross-Drilled, Advanced High Carbon Alloy with Corrosion-Resistant Plating
• Disc Construction: 2-Piece Floating Assembly, Curved 48-Vane Ventilation
• Hat Mounting: Floating H-Bobbin with Anti-Rattle Spring
• System Position: Front Axle
• Intended Use: Street / Track / Race
• Included: Calipers, 2-Piece Discs, High-Performance Brake Pads, Braided Stainless Steel Hoses, Adapters, and All Mounting Hardware
• Caliper Colors Available: Black (1Q1.9621A1), Red (1Q1.9621A2), Yellow (1Q1.9621A5), Fluorescent Yellow (1Q1.9621A7)

This kit is verified authentic via the Brembo Check app—simply scan the QR code on the product label to confirm you have a genuine Brembo GT system. Backed by Brembo's motorsport heritage, the GT-1Q-9621A delivers race-derived stopping power for high-performance street and track applications.