Piston - 1.38in X .88 SS

The Piston - 1.38in X .88 SS is a critical hydraulic brake component engineered for high-performance braking systems where reliability and precision are non-negotiable. Manufactured by Wilwood, a leader in performance brake technology, this stainless steel piston serves as the pressure transfer element in disc brake calipers, converting hydraulic force into clamping action on the rotor. Whether you're building or maintaining a race car, performance street vehicle, or heavy-duty application, this piston ensures consistent pedal response and stopping power under demanding conditions.

Constructed from stainless steel, the Piston - 1.38in X .88 SS resists corrosion and thermal degradation inherent in modern brake systems, maintaining dimensional stability across temperature extremes. The 1.38-inch diameter and 0.88-inch thickness specifications are precisely machined to OEM tolerances, ensuring a perfect seal against brake fluid pressure while maximizing piston travel efficiency. Stainless steel construction also minimizes friction and wear on caliper seals, extending service intervals and reducing maintenance downtime. This component's compact profile (2.55 x 1.05 x 2.7 inches, weighing only 0.14 lbs) allows seamless integration into Wilwood caliper assemblies without compromising structural integrity or weight distribution.

Technicians and motorsport enthusiasts specify the Wilwood Piston - 1.38in X .88 SS when rebuilding calipers, upgrading brake systems, or replacing worn hydraulic components. Compatibility extends across Wilwood's full-range caliper lineup, making it essential inventory for brake shops, race teams, and performance shops. Installation requires proper hydraulic system bleeding and seal inspection to ensure leak-free operation. For street or track applications requiring consistent, fade-resistant braking performance, this piston delivers the precision engineering and longevity that separates dependable systems from those prone to failure.