Wilwood 120-14709 DynaPro Radial Dust Seal Anodized 4-Piston Disc Brake Caliper

The Wilwood DynaPro Radial Dust Seal (DPR-DS) four-piston caliper combines radial mounting versatility with a sleek, low-profile body engineered for superior strength and extreme durability in demanding conditions. A favored choice across sports, rally, and off-road applications, the DynaPro series delivers consistent, fade-resistant braking performance in intermediate to high-temperature environments.

Stress-Flow Forged Construction:

The DynaPro's exceptional strength begins with its stress-flow forging process, which re-aligns the internal grain structure of the metal to follow the contour of the caliper body. This produces a component with greater structural integrity than machined billet block or cast alternatives.

FEA-Optimized Body Design:

The finite element analysis (FEA)-generated body features a radial transition between piston bores and caliper bridges, eliminating machined steps and shoulders in the highest-stress areas. This design significantly increases resistance to deflection and body separation under heavy load. The result is reduced structural deflection, minimized volume displacement, and a firm, confident brake pedal feel with outstanding stopping power.

Key Features:

• 4-Piston radial mount design for precise, even clamping force
• Dust-sealed stainless steel pistons for maximum protection against road and track debris
• Stress-flow forged caliper body — superior strength over machined billet or cast parts
• FEA-engineered radial bridge transitions — resists deflection and body separation under high load
• Anodized finish for corrosion resistance and long service life
• Compatible with rotors up to 12.19 inches in diameter (standard configuration)
• Intermediate to high-temperature application rating
• Optional Thermlock insulated pistons available for sustained high-heat applications

The DynaPro series is also available in a long-radius configuration to accommodate rotors up to 13.00 inches, and in Competition models featuring Thermlock insulated pistons for maximum thermal protection in race environments.