Wilwood 120-14706 Dynapro-DS 4-Piston Dust Seal Radial Mount Brake Caliper

The Wilwood Dynapro-DS (DPR-DS) is a four-piston, dust seal radial mount brake caliper engineered for performance street, sports, rally, and off-road applications. Built on a foundation of stress-flow forged aluminum, this caliper delivers exceptional strength, a low-profile design, and long-term durability in demanding environments.

The stress-flow forging process re-aligns the internal grain structure of the aluminum to follow the contour of the caliper body, producing a component with greater structural integrity than traditional machined billet or cast parts. The FEA-optimized body design incorporates a radial transition between the piston bores and caliper bridges—eliminating machined steps and shoulders in this high-stress zone to significantly improve resistance to deflection and body separation under load. The result is a firm, confident brake pedal with outstanding stopping power.

Dust wiper seals are integrated into the piston design, allowing this caliper to be used in environments where a degree of environmental sealing is required—protecting against track and road debris in intermediate to high-temperature applications.

Key Specifications:

• Piston Count: 4
• Piston Type: Stainless steel with dust boot
• Piston Bore: 1.62 in
• Total Piston Area: 4.12 in²
• Rotor Width: 0.81 in
• Maximum Rotor Diameter: 12.19 in
• Pad Area: 6.36 in²
• Pad Volume: 3.00 in³
• Material: Forged aluminum
• Weight: 4.3 lbs
• Mounting Style: Radial mount

Key Features:

• Stress-flow forged aluminum body for superior strength-to-weight ratio
• FEA-engineered radial bridge-to-bore transition eliminates stress concentration points
• Dust wiper seals on stainless steel pistons for environmental and debris protection
• Radial mount design provides versatile installation options
• Compatible with optional Thermlock insulated pistons for sustained high-heat applications
• Proven in sports, rally, and off-road driving environments

The Dynapro-DS is also available in a long-radius version to accommodate rotors up to 13.00 inches, and in competition configurations using Thermlock insulated pistons for enhanced thermal protection in extreme braking conditions.