MagnaFlow Exhaust Muffler

2011–2025 Universal Fitment / Performance Exhaust System

Part #: 13259

Overview

The MagnaFlow XL 4 x 9-inch Oval Multi-Chamber Performance Exhaust Muffler is designed for automotive enthusiasts seeking to enhance their vehicle's sound and performance. Crafted with precision and engineered for durability, this muffler delivers a deep, aggressive exhaust note while supporting improved airflow compared to stock systems. Its versatile design makes it suitable for a wide range of vehicles, from daily drivers to performance builds, providing a perfect balance of sound, style, and efficiency.

Whether you're looking to add a sporty tone to your ride or support increased horsepower and torque, the MagnaFlow 13259 muffler is an excellent upgrade. Its lightweight, reversible construction ensures easy installation and compatibility with various exhaust setups. This muffler is ideal for those who want a high-quality, performance-oriented exhaust component that combines durability with a signature MagnaFlow sound.

Key Features

The MagnaFlow 13259 features several innovative design elements that set it apart from standard mufflers:

• Constructed with a perforated stainless steel core featuring baffles and tuning gates, optimizing exhaust flow and sound tuning for a powerful, deep tone.
• Oval-shaped body measuring 4x9 inches with an overall length of 18 inches, providing a sleek, performance-oriented appearance that complements any vehicle's undercarriage.
• Universal 3-inch inlet and outlet diameter, allowing flexible installation options across a variety of vehicle makes and models.
• Weight-optimized reversible design, enabling easy orientation adjustments to suit specific exhaust configurations and preferences.
• Built with high-quality stainless steel materials, ensuring long-lasting durability and resistance to corrosion and heat.
• Dyno-proven performance enhancements, supporting increased exhaust flow and helping support horsepower and torque gains.
• Signature MagnaFlow sound—deep, aggressive, and refined—perfect for enthusiasts who want their vehicle to stand out.
• Designed for easy bolt-on installation, compatible with factory mounting points and requiring no cutting or welding in most applications.
• Backed by MagnaFlow's reputation for quality and performance, ensuring reliability and consistent sound over time.

Construction & Design

The MagnaFlow XL 4 x 9-inch Oval Multi-Chamber Muffler is built with a focus on durability and performance. Its stainless steel construction ensures resistance to rust and corrosion, making it suitable for both street and off-road use. The multi-chamber design utilizes a perforated core with baffles and tuning gates, which work together to produce a balanced, deep exhaust tone while minimizing drone at cruising speeds.

The oval shape not only provides a distinctive aesthetic but also allows for versatile installation options, fitting neatly into various exhaust layouts. The lightweight, reversible design simplifies installation, giving you the flexibility to orient the muffler for optimal fitment and sound tuning. MagnaFlow's engineering team employs advanced CAD modeling and flow dynamics to ensure that each muffler delivers maximum performance benefits without sacrificing durability or sound quality.

Installation & Fitment

This universal performance muffler is designed for straightforward bolt-on installation. It uses standard 3-inch inlet and outlet connections, compatible with most aftermarket and OEM exhaust systems. The reversible design allows for flexible orientation, making it easier to fit into tight spaces or achieve the desired sound and appearance. In most cases, no cutting, welding, or extensive modifications are required, making it a convenient upgrade for DIY enthusiasts and professional installers alike.

• Simple bolt-on installation with existing exhaust mounting points
• No cutting, drilling, or welding required in most applications
• Compatible with a wide range of vehicle makes and models, thanks to its universal design

What's Included

• MagnaFlow XL 4 x 9-inch Oval Multi-Chamber Performance Exhaust Muffler
• All necessary clamps and hardware for installation
• Installation instructions

Ideal For

• Performance enthusiasts seeking a deep, aggressive exhaust tone
• Drivers looking to support increased horsepower and torque
• Anyone upgrading their exhaust system for improved sound and durability
• DIYers and professional installers requiring a versatile, high-quality muffler