Stoptech 126.66050SR Disc Brake Rotor - Rear Right

Overview

StopTech Sport Slotted Disc Brake Rotor part number 126.66050SR is a 1-piece direct replacement rotor for factory brake systems and stock calipers. It uses a slotted, vented design to improve heat management, pad bite, and wet or dry braking response.

Built for heavy-duty rear brake applications, this rotor also features a black e-coating for corrosion protection and a high-carbon metallurgy construction in most applications for quieter operation and improved crack resistance. It is a strong fitment-focused choice for Chevrolet Silverado 3500 HD, GMC Sierra 3500 HD, and related GM truck and van applications.

Key Features

• 1-piece direct replacement brake disc for factory brake systems
• Slotted surface helps disperse heat and brake dust
• Vented rotor design supports more consistent braking performance
• Black e-coating helps protect against corrosion
• High-carbon metallurgy in most applications for quieter operation and added crack resistance
• Compatible with stock calipers

Detailed Description

The StopTech Sport Slotted Disc Brake Rotors line is built for drivers who want an OE-style replacement with added braking performance. Part number 126.66050SR combines a slotted face, vented construction, and coated finish to address common brake concerns such as pad glazing, heat buildup, and surface corrosion. For Chevrolet Silverado 3500 HD and GMC Sierra 3500 HD rear brake service, this rotor is engineered to deliver direct-fit replacement performance without changing the factory brake system.

StopTech Sport Slotted Disc Brake Rotors are also a practical upgrade for Chevrolet Express 3500 and GMC Savana 3500 rear brake applications where consistent stopping feel and durability matter. The slot pattern helps maintain pad contact and supports better performance in wet and dry conditions, while the coated finish helps preserve the rotor surface over time. The part number 126.66050SR is listed for multiple GM heavy-duty applications, including Silverado 3500, Sierra 3500, and their Classic variants.

What It Helps Address

• Brake fade from heat buildup
• Pad glazing that reduces braking response
• Brake dust accumulation on the rotor surface
• Corrosion on exposed rotor surfaces
• Noise and cracking concerns in demanding brake use

Installation Notes

Fits 2009-2010 Chevrolet Silverado 3500 HD, rear right. Fits 2009-2010 GMC Sierra 3500 HD, rear right. Fits 2003-2008 Chevrolet Express 3500, rear right. Fits 2007-2008 Chevrolet Silverado 3500 HD, rear right. Fits 2003-2008 GMC Savana 3500, rear right. Fits 2007-2008 GMC Sierra 3500 HD, rear right. Fits 2004-2007 Chevrolet Silverado 3500, rear right. Fits 2007 Chevrolet Silverado 3500 Classic, rear right. Fits 2007 GMC Sierra 3500 Classic, rear right. Fits 2004-2006 GMC Sierra 3500, rear right. Fits 2001-2005 Chevrolet Silverado 3500, rear right. Fits 2001-2005 GMC Sierra 3500, rear right.

Verify rotor dimensions, bolt pattern, and rear-right application before installation. This rotor is listed for dual rear wheel configurations in several applications, so confirm the vehicle build details against the fitment data.

Quality Assurance

StopTech designs this rotor as a direct replacement for factory brake systems and stock calipers, with slotted and coated construction aimed at consistent performance and corrosion resistance. The Sport Slotted Disc Brake Rotors line reflects StopTech’s focus on performance-oriented brake components for street use and heavy-duty service.