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Race-Grade Front Braking Authority for the Durango SRT Hellcat and Grand Cherokee Trackhawk
The Rotora RP.21520.4 H9 Super Graphite Metallic front brake pad is Rotora's most aggressive OEM-caliper compound, engineered for sustained circuit racing and sprint-endurance events on the factory 6-piston front calipers of the Dodge Durango SRT Hellcat and Jeep Grand Cherokee Trackhawk. Operating in a temperature window of 200 to 800 C with a friction coefficient of 0.42 to 0.59, the H9 delivers absolute fade resistance and a consistently high friction curve throughout prolonged track sessions. For Hellcat and Trackhawk owners who compete in time attack, sprint races, or high-intensity HPDE programs where brake temperatures remain elevated throughout an entire session, the RP.21520.4 is the correct pad selection. The direct-fit design requires no caliper upgrade, bracket, or modification, and every unit is built using the same compound material standards as Rotora's full brake kit program.
Key Features
- H9 Super Graphite Metallic compound — Rotora's highest-performance OEM-caliper pad
- Disc temperature range: 200 to 800 C / 392 to 1472 F
- Average coefficient of friction: 0.42 to 0.59
- Absolute fade resistance for sustained high-temperature circuit racing
- Direct fit for the 6-piston OEM front caliper on the Durango SRT Hellcat and Grand Cherokee Trackhawk
- Non-asbestos ceramic-carbon super graphite metallic formula
- Stable friction curve from first braking zone through final lap
- No caliper upgrade, bracket, or modification 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.21520.4 |
| Pad Type | H9 |
| Compound | Super Graphite Metallic |
| Drive Type | Race |
| Axle | Front |
| Caliper Type | 6-Piston OEM (Durango SRT Hellcat / Trackhawk) |
| Disc Temp Range | 200 to 800 C / 392 to 1472 F |
| Avg Coefficient of Friction | 0.42 to 0.59 |
| Material | Non-Asbestos Ceramic-Carbon Super Graphite Metallic |
| Quantity | 1 Set (Full Front Axle) |
| Brand | Rotora |
| UPC | N/A |
What's Included
- 1 complete front axle set of Rotora RP.21520.4 H9 Super Graphite Metallic brake pads
- Rotora pad hardware kit
About Rotora
Rotora manufactures high-performance brake systems and pad compounds used by professional racing programs and serious track drivers worldwide. The H9 Super Graphite Metallic is the peak formula in Rotora's OEM-caliper pad lineup, engineered for applications where brake temperatures remain elevated throughout an entire session and fade resistance is the primary requirement. Rotora develops every compound using the material standards of its full big brake kit program, so RP.21520.4 customers receive the same engineering foundation as a complete Rotora brake system in a direct-fit pad format.
Frequently Asked Questions
What vehicles does the Rotora RP.21520.4 fit?The RP.21520.4 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 platforms use a specific large 6-piston OEM front caliper that is not shared with the Durango SRT 392 or the Grand Cherokee SRT, which require RP.14051 series pads.
Is the H9 suitable for street use?No. The H9 Super Graphite Metallic has a minimum operating temperature of 200 C, which means it is not effective during cold street driving and will significantly under-perform until brake temperatures are elevated. This compound is intended exclusively for track and race applications. For street use, the H2 or H6 compound is the appropriate selection.
How does the H9 compare to the H8 for circuit racing?The H9 has a higher minimum operating temperature (200 C vs. 0 C for H8) and a slightly higher peak friction coefficient (up to 0.59 vs. 0.58 for H8). The H9 is optimized for sustained race conditions where temperatures remain consistently elevated, while the H8 provides broader low-temperature performance that also suits high-intensity HPDE. For full race weekends, the H9 is the definitive choice.
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.21520.4 is designed only for the Hellcat caliper. The Durango SRT 392 requires RP.14051 series pads. Using the wrong pad set creates serious safety risks.
Is the Grand Cherokee Trackhawk caliper the same as the Grand Cherokee SRT?No. The Trackhawk uses a larger, distinct 6-piston caliper than the Grand Cherokee SRT. RP.21520.4 is specific to the Trackhawk. The Grand Cherokee SRT requires RP.14051 series pads. These compounds are not interchangeable.
Does the 2022 Durango SRT Hellcat fit the RP.21520.4?No. Dodge did not produce a Durango SRT Hellcat in 2022. The variant was available in 2021 only, discontinued, then returned for 2023 through 2025. The RP.21520.4 covers the correct production years: 2021 and 2023 to 2025.
What is the correct bedding procedure for the H9 compound?Because the H9 requires elevated temperatures to reach its operating range, a standard street bedding procedure is insufficient. Perform progressive high-speed decelerations on a closed course, starting at moderate speeds and working up to race speed across multiple passes with full cool-down intervals between each run. Follow the specific Rotora H9 bedding protocol included with the pad set.
How often should H9 pads be inspected during a race weekend?Race compounds wear faster than street pads under sustained high-temperature use. Rotora recommends inspecting pad thickness between every track session and comparing the reading to the minimum thickness marked on the backing plate. Never allow pads to reach or exceed the wear indicator limit during a race event.
Installation Instructions
- Safely lift and support the vehicle on jack stands and remove the front wheels.
- Remove the caliper retaining bolts and carefully slide the caliper off the rotor. Suspend with a wire hook to avoid stress on the brake hose.
- Remove the old pads and all hardware clips or shims from the caliper bracket.
- Clean all bracket contact surfaces and sliding pins thoroughly with brake cleaner.
- Using a piston retraction tool, carefully retract all caliper pistons evenly into the bore.
- Install the new RP.21520.4 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 until full pedal feel is restored before moving the vehicle.
- Top off brake fluid as needed and perform the race-specific bedding sequence before competition 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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