Wilwood GP310 4-Piston Motorcycle Disc Brake Caliper for 1984-1999 Harley-Dav...

Wilwood GP310 4-Piston Motorcycle Disc Brake Caliper — Fits 1984–1999 Harley-Davidson Upgrade stopping power and style with the Wilwood GP310 4-piston caliper, engineered specifically for 1984–1999 Harley-Davidson® motorcycles. Precision-machined from billet aluminum, the GP310 delivers consistent, high-performance braking and long-lasting corrosion resistance for street and touring riders. Direct fit: Leg-mounted design for single and dual disc models (excludes Springer and 4-speed FL models; also not for 1983 XR 1000). High-performance 4-piston design: Provides improved pad contact, reduced fade and stronger initial bite compared with single- or dual-piston units. Durable construction: Billet aluminum body for lightweight strength, precise bore tolerances and improved heat dissipation. Distinctive styling: Bolt-on appearance that enhances the motorcycle’s look while maintaining factory fitment and function. Application-focused: Designed and engineered by Wilwood for reliable, repeatable braking on compatible Harley-Davidson models from 1984–1999. Whether you’re restoring a classic or upgrading performance, the GP310 offers a maintenance-friendly, bolt-on solution to boost braking confidence. Check fitment against your specific model year and disc configuration before purchase.