Stoptech 126.66057SL Disc Brake Rotor - Front Left

StopTech Slotted Rotor for Heavy-Duty Front Braking

The StopTech Sport Slotted Disc Brake Rotor, part number 126.66057SL, is a direct replacement front left rotor for factory brake systems and stock calipers. It is built for drivers who want improved pedal response, cleaner pad contact, and a more controlled braking feel on vehicles like the Cadillac Escalade, Chevrolet Tahoe, and GMC Yukon.

StopTech Sport Slotted Disc Brake Rotors use a one-piece vented design with a black e-coating for corrosion protection. The slotted surface helps move heat and brake dust away from the pad face, reduces glazing, and supports stronger braking in wet and dry conditions.

Key Features

• Part number 126.66057SL
• Front left disc brake rotor for factory brake systems and stock calipers
• Slotted surface helps disperse heat and brake dust
• Vented rotor construction for improved thermal management
• Black e-coating helps resist corrosion
• High-carbon metallurgy in most applications for quieter operation and better crack resistance
• 330 mm outside diameter, 30 mm nominal thickness, 28 mm discard thickness
• 6-lug pattern with 140.5 mm bolt circle and floating disc mounting

Product Details

The StopTech Sport Slotted Disc Brake Rotors line focuses on direct-fit replacement rotors that retain OE-style fitment while adding performance-oriented surface treatment. This rotor measures 330 mm in outside diameter, 55 mm overall height, and uses a straight vane vented design. The coated hat finish and black e-coating help protect exposed surfaces from corrosion, while the slotted face supports consistent pad bite and cleaner operation under repeated braking.

Compatible With 2005-2020 Cadillac Escalade front left, 2005-2020 Cadillac Escalade ESV front left, 2009-2013 Cadillac Escalade EXT front left, 2013-2019 Cadillac XTS front left, 2005-2006 Chevrolet Silverado 1500 front left, 2007-2019 Chevrolet Silverado 1500 front left, 2007-2014 Chevrolet Tahoe front left, 2009-2014 Chevrolet Suburban 1500 front left, 2007-2014 GMC Yukon front left, and 2005-2020 GMC Yukon XL applications listed in the fitment data. Part number 126.66057SL also appears in searches for Cadillac Escalade front left rotor replacement and Chevrolet Tahoe slotted brake rotor upgrades.

Common Problems This Rotor Helps Address

• Brake pad glazing from repeated stops
• Excess brake dust buildup on the rotor face
• Reduced bite in wet or damp conditions
• Heat-related fade during heavier braking
• Corrosion on exposed rotor surfaces

Installation Notes and Tips

Install this rotor on the front left position only where the fitment data matches your vehicle and brake package. Confirm rotor dimensions, lug count, bolt circle, and caliper clearance before installation. This application excludes 6-piston big brake kit setups and certain special-package vehicles noted in the fitment data. For best results, replace pads as needed and follow proper rotor bedding procedures after installation.

Quality Assurance

StopTech builds this rotor with corrosion-resistant coating and high-carbon metallurgy in most applications to support quieter operation and improved crack resistance. The part number 126.66057SL is engineered as a direct replacement for compatible factory brake systems and stock calipers.