Akebono ACT921 Disc Brake Pad Set - Front

Akebono ProACT Ultra Premium Ceramic Pad ACT921

The Akebono ACT921 ProACT Ultra Premium Ceramic Pad is a front disc brake pad set for select Cadillac CTS, Cadillac STS, and Pontiac Grand Prix applications. Built around Akebono’s ceramic brake technology, this pad line focuses on controlled friction behavior and NVH management for quieter, smoother braking performance.

Key Features

• ProACT Ultra Premium Ceramic Pad formulation from Akebono
• Front disc brake pad set for select GM applications
• Engineered with a focus on noise, vibration, and harshness control
• Fits 2003-2007 Cadillac CTS, front, with standard brakes
• Fits 2005-2008 Cadillac STS, front, with standard brakes
• Fits 2005-2008 Pontiac Grand Prix, front
• Part number ACT921 for application matching and catalog lookup

Product Details

Akebono Brake Corporation is known for ceramic brake technology and OE-focused friction development. The ProACT Ultra Premium Ceramic Pad line is built for drivers who want a ceramic front brake pad solution with attention to pedal feel, noise control, and consistent everyday braking. The ACT921 is a direct-fit option for select Cadillac CTS, Cadillac STS, and Pontiac Grand Prix front brake applications, including 2003-2007 Cadillac CTS with standard brakes and 2005-2008 Cadillac STS with standard brakes.

This part cross-references Bosch BC921 and Raybestos Brakes EHT921H for the same application.

What It Helps Address

• Brake noise during normal street driving
• Brake vibration and harshness concerns
• Uneven or inconsistent front brake response
• Wear-related replacement needs on select CTS, STS, and Grand Prix models
• OE-style ceramic pad replacement for front disc brake service

Installation Notes

Verify the vehicle’s brake configuration before ordering, especially on Cadillac CTS and Cadillac STS models that require standard brakes. Confirm the ACT921 part number against the existing pad shape and front axle application before installation. Brake pads should be installed on clean, inspected brake hardware and paired with properly serviced rotors for best results.

Quality Assurance

Akebono is a long-established brake friction manufacturer and an OE supplier with technical development centers in Japan, the United States, and France. The brand’s ProACT line reflects that engineering background with a focus on ceramic brake performance and NVH control.