Wilwood Caliper-GP310 Polished Rear 1.25in Pistons .25in Disc

Wilwood's GP310 Rear motorcycle disc brake caliper has been designed and engineered for use on 1984 - present Harley-Davidson® Motorcycles. Built around a 4-piston, high performance powerhouse, this billet aluminum caliper brings distinctive, bolt-on styling: Bracket-mounted calipers with a standard 3.50" mount spacing are available for all most models (except Springer and 4-speed FL models).

Note for Pistons, Rings, Rotors, Rods and engine internals

Unless otherwise specified, some brands supply brake rotors, pistons, strut mounts, rods and rings separately. In some cases, titles may indicate plural, or 'set' - eg the term “ring set” often refers to the rings for a single piston only. If you’re unsure about what’s included with this product, please contact our team for clarification.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Reference Information

Brake Caliper, Billet Aluminum, Polished, 4-Piston, Harley-Davidson®, Left Side Rear Mount, Each

Built around a 4-piston, high performance powerhouse, these Wilwood GP310 billet aluminum calipers bring distinctive, bold styling. Stainless steel pistons are employed to reduce brake fade while resisting corrosion, and high-temperature piston seals are utilized to extend life, control retraction, and provide drag-free operation. Additional features include bright finish bleed screws and hardware, plus an exclusive anti-rattle pad clip. The included low-dust, low-noise brake pads are designed to operate in the widest range of temperatures and environments, utilizing Wilwood's industry-leading stainless steel rotor-compatible formulation.