Wilwood 120-15585-P Forged DynaPro Low Profile DS Disc Brake Caliper 5.25" Lug Mount Polished

The Wilwood 120-15585-P Forged DynaPro Low Profile Dust Seal (FDPLP-DS) is a high-performance, lug-mount disc brake caliper featuring a 5.25" mounting span, 1.12" pistons, and compatibility with .81" thick rotors. Finished in a polished forged billet, this caliper represents the latest generation of Wilwood's DynaPro series — a direct upgrade or replacement for applications previously using Dynalite-style calipers.

Stress-Flow Forged Construction

The FDPLP-DS body is stress-flow forged from premium-grade billet aluminum. This process re-aligns the metal's grain structure to follow the contour of the caliper body, producing a part with substantially greater strength than components machined from straight-grain billet blocks. The FEA-optimized body incorporates fortified radial transitions between piston housings and bridges, eliminating stress-concentrating steps and shoulders that can lead to deflection or body separation under heavy braking loads.

Key Features:

• Forged billet aluminum body with stress-flow grain alignment for superior structural integrity
• 1.12" heavy-wall stainless steel pistons resist corrosion and slow heat transfer from brake pads, providing firm pedal feel even under high hydraulic pressure
• Low-profile design engineered for limited outboard rotor hat clearance and narrow swept-area rotors — ideal for tight clearance applications
• Quick-E-Clip pad retainers support the 4812-type brake pad from the top, enabling fast pad service without caliper removal
• Wilwood SRS (Shim Retention System) bridge plates eliminate pad-induced bridge wear, reduce pad rattle, and dampen vibration harmonics that contribute to brake squeal
• Dust seal technology protects piston bores for extended service life in street and competition environments
• Internal fluid passages with four-corner bleed screws allow mounting in any front, rear, left, or right position
• Polished forged finish delivers a clean, show-quality appearance suitable for competition or display builds
• Compatible with .81" thick rotors on a 5.25" lug mount
• Instructions included

Reduced caliper deflection and minimized fluid volume displacement translate directly to a firm, responsive brake pedal with shorter travel and outstanding clamping efficiency — even when paired with power-assist brake systems operating at elevated pressures.