Hawk HB521W.800 DTC-30 Race Brake Pads for AP Racing CP8250 Wilwood Superlite

Vehicle Fitment

This is a universal racing caliper brake pad. It is not vehicle-specific and is not sold for use with OEM stock calipers. Fitment is determined by caliper model. Compatible racing calipers include:

• AP Racing CP8250 / CP8250D41
• AP Racing (Essex) CP8350-24S4L / CP8350-25S4L / CP8350-26S4L / CP8350-27S4L / CP8350-32S4L / CP8350-33S4L
• CompBrake Pro Race One
• StopTech ST-43 / C43
• Wilwood Narrow Superlite 4 / Narrow Superlite 6 (plate shape 7420)
• Wilwood Superlite Bridge Bolt
• Wilwood Superlite 4R / Superlite 6R (plate shape 7420)
• Wilwood Superlite ST
• Wilwood Forged Superlite Internal

Fitment Notes

• This pad is universal for racing calipers - it is not designed for OEM stock brake calipers and has no vehicle-specific fitment.
• Pad thickness: 0.800 in. This corresponds to Wilwood plate shape 7420 and AP Racing CP8250D41. The same pad shape is also available in 0.650 in. thickness (Wilwood plate shape 7416); verify your specific caliper's required pad thickness before ordering.
• Some Wilwood Superlite calipers use the bridge bolt retention method, which requires a center mounting hole in the pad. Depending on the specific caliper configuration, the center hole may need to be drilled - verify your caliper's pad retention method before installation.
• Not compatible with carbon ceramic rotors. For use with iron/metal rotors only.
• DTC-30 is a motorsport compound. While it operates effectively from cold and has been used on street-driven vehicles where braking performance is the priority, it is a race-classification compound that will produce more dust and noise than street compounds. It is not suited for comfortable daily driving.
• DTC-30 is frequently run on the rear axle of lighter race vehicles paired with DTC-60 at the front, providing a front-biased split-friction race setup. It is also run on both axles in dirt track, gravel rally, and drag racing applications.
• Sold as a set of two pads (one caliper). For a full brake system upgrade, one set per caliper is required.

Features

• DTC-30 Ferro-Carbon compound - Hawk's controllable-torque, multi-purpose motorsport formulation delivering smooth consistent feel and bite across a remarkably wide temperature range, proven in AP Racing CP8250/CP8350, StopTech ST-43, and Wilwood Superlite caliper applications for dirt track, gravel rally, drag racing, autocross, and circuit racing where excellent cold effectiveness and smooth pedal feel are prioritized.
• Excellent cold effectiveness - The DTC-30 provides strong, consistent brake torque from ambient temperature without requiring a heat warm-up cycle - a defining advantage over higher-temperature race compounds when used in autocross, drag racing, or short-format circuit events where sustained brake temperatures are not achieved before the first competition run.
• Controllable, predictable medium torque - The DTC-30's signature characteristic is its smooth, manageable torque output at both the front and rear axle in AP Racing and Wilwood caliper applications, giving drivers the precision to modulate brake pressure and achieve clean release without the abrupt engagement that characterizes higher-torque DTC compounds.
• Superior release characteristics - Delivers clean, linear brake release through each application, supporting stable power application, neutral handling balance, and precise corner exit behavior - essential qualities when running large-piston aftermarket racing calipers where torque output is inherently amplified relative to OEM systems.
• Very low rotor wear - DTC-30 produces significantly lower abrasive rotor wear than DTC-60 and DTC-70, extending disc service life across race seasons and multi-event competition schedules - an important advantage when using the premium rotors required for AP Racing and Wilwood big brake applications.
• Wide operating temperature range - 100-1,200°F total range with a 100-800°F optimal window, providing consistent performance from cold ambient through sustained high-load racing temperatures across dirt track, rally, autocross, and circuit applications.
• Multi-purpose motorsport versatility - Proven and recommended for dirt circle track, gravel rally, NASCAR modified, drag racing, trophy trucks, pro buggies, and road course applications where controllable torque and cold effectiveness are more critical than maximum peak deceleration force.
• Effective as both a front and rear compound - On lighter platforms running AP Racing or Wilwood calipers, DTC-30 works well on both axles. In split-friction setups on these calipers, DTC-30 is the natural rear choice paired with DTC-60 at the front to bias braking torque toward the front axle.
• 100% asbestos, lead, chromium, cadmium, and antimony free - Manufactured in an ISO-certified facility to strict quality and environmental standards.

Specifications

• Part Number: HB521W.800
• Compound: DTC-30
• Compound Code: W
• Friction Material: Ferro-Carbon
• Pad Thickness: 0.800 in. (Wilwood plate shape 7420 / AP Racing CP8250D41)
• Total Operating Temperature Range: 100-1,200°F
• Optimal Temperature Range: 100-800°F
• Torque Level: Medium / Controllable
• Caliper Compatibility: AP Racing CP8250 / CP8250D41 / CP8350 (Essex); CompBrake Pro Race One; StopTech ST-43 / C43; Wilwood Narrow Superlite 4 / Superlite 6 / Superlite Bridge Bolt / Superlite 4R / Superlite 6R / Superlite ST / Forged Superlite Internal (7420 plate shape)
• Rotor Compatibility: Iron/metal rotors only - not compatible with carbon ceramic rotors
• Recommended Use: Motorsport / Autocross / Drag Racing / Dirt Track / Gravel Rally - limited suitability for casual street driving
• Sold as: Set of 2 (one caliper)

Included Components

• 2x Hawk DTC-30 Brake Pads (HB521W.800)

Product Description

The Hawk HB521W.800 DTC-30 brake pads bring Hawk's controllable-torque multi-purpose motorsport compound to the HB521 pad shape at 0.800 in. thickness, fitting AP Racing CP8250, CP8250D41, and CP8350 (Essex), CompBrake Pro Race One, StopTech ST-43/C43, and the Wilwood Superlite family of racing calipers using the 7420 plate shape. Among the motorsport compounds available for the HB521 shape, DTC-30 is the most versatile - its 100-1,200°F operating range starting from ambient cold means it performs reliably across the full spectrum of motorsport applications, from short-format drag racing and autocross events where cold effectiveness is critical, through sustained circuit racing and rally stages where heat accumulates.

In AP Racing and Wilwood big brake caliper applications, the DTC-30's controllable medium torque and smooth consistent pedal feel are particularly well-suited to two scenarios. The first is as the rear caliper compound in a split-friction setup on lighter platforms - pairing DTC-60 at the front AP Racing or Wilwood caliper with DTC-30 at the rear establishes a front-biased brake balance that provides strong deceleration while keeping rear torque smooth and controllable. The second is as the sole compound on both axles for autocross, drag racing, and dirt track applications where the DTC-30's excellent cold bite and smooth engagement are more valuable than the maximum peak torque of harder compounds. Its very low rotor wear also extends disc service intervals significantly compared to DTC-60 and DTC-70 - an important advantage for teams running premium rotors in multi-event competition schedules.

DTC-30 is a motorsport-classification compound. While it has been used successfully on street-driven performance cars where braking is the primary concern, it is not suited for quiet daily driving. At 0.800 in. thickness, this pad is specific to the Wilwood 7420 plate configuration and AP Racing CP8250D41. The same DTC-30 compound is available at 0.650 in. for 7416-plate calipers. Verify your caliper's required pad thickness and retention method - bridge bolt Wilwood configurations may require the center hole to be drilled. Compatible with iron and metal rotors only; carbon ceramic brake discs are not supported.