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Track-Ready Stopping Power for Supercharged Mopar SUVs
The Rotora RP.21520.3 H8 Graphite Metallic front brake pad is purpose-built for high-performance track and sprint race use on the factory 6-piston front calipers of the Dodge Durango SRT Hellcat and Jeep Grand Cherokee Trackhawk. Operating across a temperature range of 0 to 800 C with a friction coefficient of 0.43 to 0.58, the RP.21520.3 delivers exceptional thermal stability, fade resistance, and consistent pedal feel under the most aggressive braking loads. For Hellcat and Trackhawk owners who take their vehicles to high-performance driving events, HPDE sessions, or sprint races, the H8 compound provides the confidence-inspiring braking authority that these platforms demand. The RP.21520.3 is a direct-fit pad for the OEM front caliper with no hardware modification required, and every unit is built to the same material standards as Rotora's full big brake kit compound program.
Key Features
- H8 Graphite Metallic compound — track and sprint race specification
- Disc temperature range: 0 to 800 C / 0 to 1472 F
- Average coefficient of friction: 0.43 to 0.58
- Exceptional fade resistance and thermal stability under sustained high loads
- Direct fit for the 6-piston OEM front caliper on the Durango SRT Hellcat and Grand Cherokee Trackhawk
- Non-asbestos ceramic-carbon-reinforced graphite metallic formula
- Confident, consistent pedal feel from cold to race operating temperature
- No caliper modification, bracket, or spacer required
- Rotora factory quality standards throughout
Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2021 | Dodge | Durango | SRT Hellcat |
| 2023-2025 | Dodge | Durango | SRT Hellcat |
| 2018-2021 | Jeep | Grand Cherokee | Trackhawk |
Specifications
| Detail | Value |
|---|---|
| Part Number | RP.21520.3 |
| Pad Type | H8 |
| Compound | Graphite Metallic |
| Drive Type | Track / Race |
| Axle | Front |
| Caliper Type | 6-Piston OEM (Durango SRT Hellcat / Trackhawk) |
| Disc Temp Range | 0 to 800 C / 0 to 1472 F |
| Avg Coefficient of Friction | 0.43 to 0.58 |
| Material | Non-Asbestos Ceramic-Carbon Graphite Metallic |
| Quantity | 1 Set (Full Front Axle) |
| Brand | Rotora |
| UPC | N/A |
What's Included
- 1 complete front axle set of Rotora RP.21520.3 H8 Graphite Metallic brake pads
- Rotora pad hardware kit
About Rotora
Rotora is a manufacturer of high-performance brake systems and compounds used by track enthusiasts and professional racing programs worldwide. The H8 Graphite Metallic formula is Rotora's premier track-race compound for OEM-caliper applications, delivering a wide temperature ceiling and stable friction behavior from the first lap through extended sessions. Rotora develops every pad using the same material standards found in its full big brake kit program, giving RP.21520.3 customers genuine engineering-grade track capability without replacing their factory calipers.
Frequently Asked Questions
What vehicles does the Rotora RP.21520.3 fit?The RP.21520.3 fits the 2021 Dodge Durango SRT Hellcat, the 2023 to 2025 Dodge Durango SRT Hellcat, and the 2018 to 2021 Jeep Grand Cherokee Trackhawk. These vehicles share a specific large 6-piston OEM front caliper that is different from the caliper on the Durango SRT 392 or Grand Cherokee SRT, which require the RP.14051 series.
Can I use the H8 for both street and track driving?Yes. The H8 operates from 0 C and is functional on the street, though it reaches peak performance at elevated track temperatures. Many Hellcat and Trackhawk owners drive on H8 pads daily while also taking their vehicles to track events. Expect slightly more dust and noise than a ceramic pad during cold street operation.
Is the Durango SRT Hellcat caliper the same as the Durango SRT 392?No. The Durango SRT Hellcat uses a larger 6-piston front caliper than the Durango SRT 392. The RP.21520.3 is designed for the Hellcat caliper only. Installing pads designed for the SRT 392 caliper (RP.14051 series) in a Hellcat caliper is incorrect and creates safety risks.
Is the Grand Cherokee Trackhawk caliper the same as the Grand Cherokee SRT?No. The Grand Cherokee Trackhawk uses a larger, distinct 6-piston front caliper compared to the Grand Cherokee SRT. The RP.21520.3 is specific to the Trackhawk caliper. The Grand Cherokee SRT requires RP.14051 series pads. Do not interchange these pad sets.
Does the 2022 Durango SRT Hellcat fit the RP.21520.3?No. Dodge did not produce the Durango SRT Hellcat in 2022. It was available in 2021, then returned for model years 2023 through 2025. The RP.21520.3 covers the correct production years: 2021 and 2023 to 2025.
How does the H8 differ from the H6 for track use?The H8 has a higher temperature ceiling (800 C vs. 500 C for H6) and a higher average friction coefficient (0.43 to 0.58 vs. 0.32 to 0.45 for H6). The H8 delivers greater fade resistance under sustained high-speed braking and is preferred for HPDE sessions, sprint races, and repeated hard stops that would push the H6 beyond its thermal limits.
Is bedding-in required for the RP.21520.3?Yes. Perform 8 to 10 progressive stops from 60 mph down to 10 mph with full cooling intervals between each stop, followed by 4 to 6 firmer progressive stops. Allow complete cool-down before track use. Proper bedding transfers a uniform friction film to the rotor and allows the H8 compound to reach full performance potential.
Can I run the RP.21520.3 with the factory rotors?Yes. The RP.21520.3 is designed for use with the factory rotor setup on the Durango SRT Hellcat and Grand Cherokee Trackhawk. Inspect rotor thickness and surface condition before installing new pads, and replace any rotors that have reached minimum thickness or show significant heat cracking.
Installation Instructions
- Safely lift and support the vehicle on jack stands and remove the front wheels.
- Remove the caliper retaining bolts and slide the caliper off the rotor. Suspend with a wire hook to avoid brake hose stress.
- Remove the old brake pads and all hardware clips or shims from the caliper bracket.
- Clean all bracket contact surfaces and sliding pins with brake cleaner.
- Using a piston retraction tool, carefully retract all caliper pistons evenly into the bore.
- Install the new RP.21520.3 pads into the bracket, ensuring all clips are fully seated.
- Reinstall the caliper and torque all bolts to factory specification.
- Reinstall the wheel and torque lug nuts to specification.
- Pump the brake pedal firmly until full pedal feel is restored before moving the vehicle.
- Top off brake fluid as needed and perform the recommended bedding procedure before track use.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
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