Wilwood 120-13842-BK Forged Dynalite Internal 4-Piston Lug-Mount Caliper, Black

Vehicle Fitment

• Universal fit - lug-mount caliper. Confirm rotor size, hat pattern, and clearance before installation.

Features

• Forged aluminum body for high strength and low weight
• 4 stainless-steel pistons for reliable and balanced braking
• Stress-flow forged design provides excellent structural rigidity
• Single split-bridge design improves aesthetics and reduces weight
• Lug-mount configuration with 5.25" mounting center
• Black powder-coat finish for a durable and clean look
• Compact design ideal for tight or custom installations
• High-performance braking capability in a small form factor

Specifications

• Part Number: 120-13842-BK
• Series: Forged Dynalite Internal
• Piston Count: 4
• Piston Diameter: 1.62" x 2
• Total Piston Area: 4.12 in²
• Rotor Width Compatibility: nominally 0.81"
• Rotor Diameter Compatibility: up to 13.06"
• Mount Center: 5.25" lug
• Mount Hole Size: 0.39"
• Mount Height: 2.03"
• Inlet Thread Size: 1/8-27 NPT
• Weight: approx. 3.6 lb

Included Components

• 1x caliper body - Wilwood 120-13842-BK (Black)
• Pre-installed stainless pistons
• Seals and bleeder screw
• Installation instructions

Product Description

The Wilwood 120-13842-BK is a high-performance, forged 4-piston caliper designed for compact and custom braking systems. The stress-flow forging process aligns the internal grain structure for enhanced strength and stiffness, reducing the risk of deflection under heavy braking loads.

With four 1.62" stainless-steel pistons and a total piston area of 4.12 in², this caliper provides consistent and balanced pad engagement. Its lug-mount design (5.25" center) makes it suitable for custom rotor hats and performance builds. The caliper supports rotors up to 13.06" in diameter with a width around 0.81", making it ideal for tight or lightweight setups.

Finished in a sleek black powder coat, this Dynalite Internal caliper combines performance and style. It's a great choice for track cars, custom race builds, or performance street vehicles where a compact yet powerful brake solution is needed. Be sure to verify rotor compatibility, hat design, and wheel clearance before installation to ensure a proper fit.