Wilwood 120-8727-RD Powerlite Radial Mount Disc Brake Caliper - 4-Piston Red

The Wilwood Powerlite 4-Piston Radial Mount Caliper (P/N 120-8727-RD) is a high-performance brake caliper engineered for sports, rally, and off-road driving applications. Starting at just 2.26 lbs, the Powerlite delivers an exceptional strength-to-weight ratio through advanced forging techniques and intelligent structural design.

Stress-Flow Forged Construction:

The caliper body is manufactured using a stress-flow forging process that re-aligns the metal's grain structure to follow the contour of the caliper body. Unlike machining from straight billet, this method eliminates internal grain structure interruptions and stress concentrations, resulting in a stronger, more durable caliper that performs reliably under high-temperature braking conditions.

FEA-Optimized Radial Transition Design:

Wilwood's Finite Element Analysis (FEA) generated radial transition design removes steps and shoulders between the piston housing body and the caliper bridges. This continuous radius geometry in the critical load-bearing zone substantially increases resistance to deflection and caliper body separation under hard braking loads.

Key Features:

• 4-piston radial mount design for precise, even clamping force
• Lightweight at 2.26 lbs — forged aluminum construction
• Compatible with Wilwood 7912-type brake pads
• Quick-Clip pad retainers support pads from the top, eliminating the need for a pad support step and allowing mounting closer to the hub
• Easy pad access and replacement without caliper removal
• Pad radius compatible with rotor diameters from 9.45" (240.0 mm) to 11.75" (298.5 mm)
• Fits inside many 13.00" (330.2 mm) wheel applications
• Available in multiple brake pad compounds for street, sport, and competition use
• Red anodized finish for corrosion resistance and appearance

The Powerlite caliper's slim profile and versatile mounting design make it an ideal upgrade for lightweight performance builds where reducing unsprung weight and maintaining strong, consistent braking performance are critical priorities.