J.C. Whitney SET-JB27110048G-2 Front Brake Disc Rotor Set G-Coated Vented Cast Iron OEM Replacement

The J.C. Whitney SET-JB27110048G-2 is a two-piece front brake disc rotor set engineered as a direct OEM replacement for select Buick and Chevrolet full-size passenger cars. These rotors replace GM OEM part number 15793340 and are designed to restore factory braking performance with a precise, application-specific fit — no modifications required.

Constructed from high-grade cast iron, these rotors feature a vented disc design that promotes airflow between the rotor faces, dissipating heat rapidly during hard braking to help prevent brake fade. The G-Coat (geomet) corrosion-resistant finish provides superior rust protection over conventional bare-metal rotors, keeping the rotor surfaces and hats looking clean and extending shelf and service life. A plain (non-drilled, non-slotted) surface delivers consistent, even pad contact ideal for everyday street driving.

Key Features:

• Set includes: Right-hand (RH) and left-hand (LH) front rotors — complete two-piece set
• Construction: Premium cast iron for durability and consistent thermal performance
• Design: Vented disc for enhanced heat dissipation and fade resistance
• Surface: Plain (smooth) rotor face for optimal pad break-in and even wear
• Finish: G-Coat corrosion-resistant coating protects against rust and surface oxidation
• Lug pattern: 5-lug hub configuration
• OEM replacement: Replaces GM part number 15793340 (PFM cross-reference)
• Direct bolt-on installation — no drilling, cutting, or modification needed

These rotors are manufactured to meet or exceed OEM specifications, ensuring reliable stopping power and a factory-quality fit. The G-Coat finish makes them an especially smart choice for vehicles in high-humidity or road-salt environments where premature rotor rust is a common concern.