Caliper Piston - 2.75 Stainless

The Caliper Piston - 2.75 Stainless is a precision-engineered brake component designed for high-performance and heavy-duty braking systems where reliable stopping power is non-negotiable. Built to OEM specifications for GM III brake calipers, this 2.75-inch stainless steel piston restores caliper responsiveness and ensures consistent pad pressure across the rotor surface. Whether you're rebuilding a street machine, restoring a classic, or maintaining a truck that handles demanding loads, a quality caliper piston is essential to brake system integrity.

Manufactured from stainless steel, this Wilwood piston resists corrosion and thermal degradation that commonly affects cast iron or plated alternatives, extending caliper lifespan and reducing maintenance intervals. The 2.75-inch diameter and 1.68-inch length are precision-machined to tight tolerances, ensuring a leak-free seal within the caliper bore and uniform friction pressure delivery to brake pads. Stainless construction also handles repeated thermal cycling—critical for performance driving, towing, or mountain roads where brake temperatures spike—without pitting or binding that compromises modulation and feel.

This piston is ideal for technicians and enthusiasts rebuilding Wilwood GM III calipers or upgrading existing brake systems that use this bore size. Installation requires caliper removal and honing to ensure bore condition matches piston specifications; use fresh brake fluid and quality seals during reassembly to prevent leaks. Proper piston fit is critical—oversized or undersized pistons lead to drag, loss of pressure, or insufficient pad contact. Verify your caliper model and bore size before purchase to guarantee compatibility and optimal braking performance.