Wilwood Aero4 Rear Big Brake Kit

2011–2018 RAM 1500

Part #: 140-16026

Overview

The Wilwood Aero4 Rear Big Brake Kit is a precision-engineered performance upgrade designed specifically for the 2011 to 2018 RAM 1500. This rear brake system replaces the factory components with high-capacity 4-piston calipers and oversized slotted rotors, delivering enhanced stopping power, improved heat management, and a bold aesthetic. Ideal for RAM 1500 owners who have upgraded their front brakes or require superior rear braking performance due to towing, hauling, or off-road use, this kit ensures balanced and reliable braking tailored to the truck’s original brake bias and ABS system.

Built to accommodate larger wheels and tires, the Aero4 Rear Big Brake Kit supports trucks with suspension modifications and increased vehicle weight, providing confidence and control under demanding conditions.

Key Features

This rear big brake kit combines advanced engineering and premium materials to deliver superior braking performance and durability. Key features include:

• High-capacity Wilwood Aerolite 4R 4-piston calipers with black powder-coated finish for corrosion resistance and aggressive styling
• Oversized 15.00" diameter slotted rotors designed for improved heat dissipation and fade resistance
• BP-20 compound brake pads optimized for consistent stopping power and low brake dust
• Complete integration with the OEM parking brake assembly and ABS system without modification
• Stainless steel braided flex lines included for enhanced brake pedal feel and long-term durability
• Radial mount caliper design for increased stiffness and braking efficiency
• Maintains original equipment master cylinder output and brake bias for safe, balanced braking
• Requires minimum 19-inch wheel diameter to accommodate larger rotor size

Construction & Design

The Wilwood Aerolite 4R calipers are crafted from lightweight, high-strength aluminum alloy, reducing unsprung weight while providing excellent heat dissipation. The black powder coat finish offers superior corrosion resistance and a sleek, modern look that complements the rugged styling of the RAM 1500.

The 15.00" rotors are precision-machined from premium cast iron and feature slotted surfaces that enhance pad bite and help channel away gases and debris during heavy braking. This design maintains consistent brake performance during towing, hauling, or spirited driving, reducing fade and improving overall safety.

Installation & Fitment

This big brake kit is engineered for direct bolt-on installation on 2011–2018 RAM 1500 models, utilizing the OEM axle and parking brake assembly. No major modifications are required, making it a straightforward upgrade for experienced enthusiasts and professional installers alike. The kit is fully compatible with the vehicle’s ABS system and master cylinder output, preserving all factory safety features.

Due to the larger rotor diameter, a minimum 19-inch wheel diameter is required to ensure proper clearance and fitment.

What's Included

• Wilwood Aerolite 4R 4-piston black powder-coated calipers
• 15.00" diameter slotted rotors
• BP-20 compound brake pads
• Stainless steel braided flex lines
• All necessary mounting hardware and brackets

Ideal For

This rear big brake kit is perfect for RAM 1500 owners who have upgraded their front brakes or require enhanced rear braking performance due to increased vehicle weight, towing, or off-road use. It is also well-suited for enthusiasts who have installed larger wheels and tires or upgraded suspension components and need a brake system that matches their truck’s enhanced capabilities.

Wilwood Engineering is a major manufacturer of high-performance disc brake solutions spanning racing, street performance, and specialty OE applications. From big brake kits and calipers to rotors and hydraulic components, Wilwood upgrades are built for stronger stopping power, better heat management, and consistent pedal feel when stock brakes aren’t enough.