Performance Machine 4 Piston Brake Caliper 125x4SL
The Performance Machine 125x4SL brings four-piston braking performance to Harley-Davidson Softail, Dyna, Sportster, and FXR riders who want serious stopping power without sacrificing the clean, custom look they’ve built their bike around. Its slimline profile keeps the aesthetic tight while the four-piston design ensures you have full control when it matters most.
Key Features
- Slimline 125x4SL profile – narrower than standard 4-piston calipers for cleaner visual lines
- Four-piston dual-action design for maximum stopping power across a broad fitment range
- Precision-machined from billet aluminum for strength and long-term durability
- Available in Polished, Chrome, and Black Contrast Cut finishes
- Black Contrast Cut finish: polished base, black anodized, then machine-recut for a two-tone effect
- Fits 1984-1999 Harley-Davidson Softail, Dyna, Sportster, and FXR models
- Includes brake pads, bleeder screw, and 3/8-24 banjo bolt
- Made in the USA
Technical Specifications
- Piston Configuration: 4-piston dual-action
- Disc Size: 11.5 inch
- Finish Options: Polished, Chrome, Black Contrast Cut
- Includes: Brake pads, bleeder screw, 3/8-24 banjo bolt
- Origin: Made in the USA
Fitment Notes
- Some applications may require an additional mounting bracket – verify fitment before ordering
- Covers Softail, Dyna, Sportster, and FXR platforms from 1984 to 1999
- Review the Fitment tab for the complete year and model breakdown













