I wanted to share my thoughts after fitting the Grenadier-specific X-Line brake kit to our vehicle. Having previously run PowerBrake on a Jeep JL—which had already decent factory brakes due to its lighter weight—I was genuinely surprised by the transformation on the Grenadier.
The OEM braking on the Grenadier feels tuned more towards comfort, with a noticeably soft pedal and progressive bite. Once the PowerBrake 6-piston caliper kit and 350mm rotors went on, everything changed. The pedal feel is significantly firmer, and stopping power is vastly improved—more linear, more confidence-inspiring, and better controlled under load.
This is not a generic “one-size-fits-all” BBK. PowerBrake engineers matched the piston sizes and system balance specifically for the Grenadier, taking into account the factory master cylinder and brake bias. The result? Optimized modulation and response, without overboosting or underperforming.
Regarding cooling, PowerBrake equips the Grenadier-specific kit with a two-piece rotor design featuring 72 internal vane cooling fins—offering significantly better thermal efficiency than typical one-piece setups. Heat fade has been a non-issue so far, even under repeated hard use.
As for wheel clearance: the kit fits most 17” wheels without issue. However, clearance still depends on the inner barrel profile and spoke design. I haven’t tested it on the OEM steel wheels, so I can’t confirm compatibility there. If you’re considering this upgrade, I highly recommend contacting your local distributor or dealer to request the official caliper fitment template and verify dimensions with your wheels before purchase.
Photos of the installation and real-world testing are included below. Feel free to drop any questions—I’d be happy to help.
The OEM braking on the Grenadier feels tuned more towards comfort, with a noticeably soft pedal and progressive bite. Once the PowerBrake 6-piston caliper kit and 350mm rotors went on, everything changed. The pedal feel is significantly firmer, and stopping power is vastly improved—more linear, more confidence-inspiring, and better controlled under load.
This is not a generic “one-size-fits-all” BBK. PowerBrake engineers matched the piston sizes and system balance specifically for the Grenadier, taking into account the factory master cylinder and brake bias. The result? Optimized modulation and response, without overboosting or underperforming.
Regarding cooling, PowerBrake equips the Grenadier-specific kit with a two-piece rotor design featuring 72 internal vane cooling fins—offering significantly better thermal efficiency than typical one-piece setups. Heat fade has been a non-issue so far, even under repeated hard use.
As for wheel clearance: the kit fits most 17” wheels without issue. However, clearance still depends on the inner barrel profile and spoke design. I haven’t tested it on the OEM steel wheels, so I can’t confirm compatibility there. If you’re considering this upgrade, I highly recommend contacting your local distributor or dealer to request the official caliper fitment template and verify dimensions with your wheels before purchase.
Photos of the installation and real-world testing are included below. Feel free to drop any questions—I’d be happy to help.
