PowerStop K5515 Disc Brake Kit - Front and Rear

PowerStop Z23 Brake Upgrade Kit for Daily Driving

PowerStop K5515 is a front and rear disc brake kit built for daily-driver braking upgrades on select Chevrolet, Buick, and Saab applications. It combines carbon-fiber ceramic pads with drilled and slotted vented rotors to improve stopping response while helping reduce brake dust and rotor surface buildup.

The PowerStop Z23 Evolution Sport Brake Upgrade Kit is aimed at drivers who want a direct-fit brake refresh with performance-focused materials. For Chevrolet Impala, Buick Regal, Buick LaCrosse, Chevrolet Malibu, and Saab 9-5 applications, K5515 brings together pad and rotor components in one service kit.

Key Features

• Carbon Fiber Ceramic friction material for performance-oriented street use
• Drilled and slotted rotor surface for improved heat management and consistent pad contact
• Vented front and rear rotor construction
• Low-dust pad formulation to help keep wheels cleaner
• Pad shims included
• Front rotor outside diameter: 321.0 mm
• Rear rotor outside diameter: 315.2 mm

Product Details

PowerStop K5515 is part of the Z23 Daily Driver Carbon-Fiber Ceramic Brake Pad and Drilled & Slotted Rotor Kit line, a product family focused on straightforward brake upgrades for everyday vehicles. This kit uses carbon-fiber ceramic pads paired with drilled and slotted rotors to support smoother braking performance, reduced dust, and added resistance to rust and corrosion on the rotor surface. It is a fitment-specific solution for vehicles such as the 2014-2020 Chevrolet Impala, 2012-2017 Buick Regal with 1 piston front calipers and 321mm front rotors, and 2012-2016 Buick LaCrosse with 321mm front rotors and vented rear rotors. K5515 also fits select 2013-2015 Chevrolet Malibu, 2011 Buick LaCrosse, 2011 Buick Regal, and 2011 Saab 9-5 models with the listed rotor and caliper configurations.

What This Brake Kit Helps Address

• Brake fade concerns during repeated stop-and-go driving
• Excessive brake dust on wheels
• Worn or uneven braking feel from aging pads and rotors
• Rotor surface rust and corrosion buildup
• Reduced braking consistency from heat-soaked components

Installation Notes and Tips

Verify rotor diameter, caliper configuration, and rear rotor construction before ordering. This kit is listed for front and rear service on the specified applications, including 321mm front rotor setups and vented rear rotor configurations where noted. Confirm vehicle trim and brake package details for the 2011 Saab 9-5 performance package and the 2012-2017 Buick Regal 1 piston front caliper application. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

PowerStop positions the Z23 line as a direct, bolt-on brake upgrade for daily drivers, with components selected to balance braking performance, dust control, and rotor durability. K5515 is built around performance-grade carbon-fiber ceramic friction material and vented drilled-and-slotted rotors for the listed vehicle applications.