GiroDisc A1-318 Slotted Front Rotors for 2021-2025 Cadillac CT4-V Blackwing

Vehicle Fitment

• 2021-2025 Cadillac CT4-V Blackwing - Front axle (stock calipers / rotor setup)

Features

• 2-piece floating rotor design - high-carbon cast-iron rotor ring + 6061-T6 aluminum hat for reduced rotating and unsprung mass
• Slotted & vented rotor surface - improves pad bite, helps evacuate gases/debris, and enhances braking consistency under heavy or repeated use
• Curved-vane internal ventilation - draws air through the hub to help cool the rotor under load or track use
• Floating-mount assembly with alloy steel pins, Belleville washers & spring clips - allows thermal expansion and self-centering while avoiding noise
• Direct bolt-on replacement - works with OEM calipers and hub bolt pattern, no modifications required
• Reusable hat design - when rotor rings wear, only rings need replacement; aluminum hats can be reused
• High-quality US construction - precise machining and durability for street or track use
• Improved braking performance and handling - reduced rotational and unsprung mass enhances suspension response and braking modulation

Specifications

• Part Number: A1-318
• Rotor Type: 2-Piece Floating, Slotted & Vented Front Rotors
• Hat Material: 6061-T6 aluminum
• Rotor Ring Material: High-carbon cast iron
• Mounting: Floating mount with alloy steel drive pins, Belleville washers, and spring clips
• Sold As: Pair (front left + right) with floating-mount hardware
• Orientation: Front axle only

Included Components

• 2x Front brake rotors (left and right) - 2-piece, slotted & vented
• Floating-mount hardware: drive pins, Belleville washers, spring clips / fasteners

Product Description

The GiroDisc A1-318 Slotted Front Rotor set is a performance-focused upgrade engineered specifically for the 2021-2025 Cadillac CT4-V Blackwing. By replacing the stock rotors with a 2-piece floating design - combining a cast-iron rotor ring and a lightweight aluminum hat - A1-318 reduces both rotating and unsprung mass. This improves suspension response, braking modulation, and steering feel, ideal for spirited driving or track use.

With a slotted and vented disc surface plus curved-vane internal ventilation, A1-318 offers enhanced cooling and pad-gas / debris purge, reducing brake fade under repeated hard braking. The floating-mount system ensures thermal expansion and self-centering while preventing cold-start rattles. Long-term maintenance is cost-effective: worn rings can be replaced without discarding the aluminum hats. A1-318 provides Cadillac CT4-V Blackwing owners with a durable, high-performance, and maintainable brake solution that enhances stopping power and overall driving performance.