MagnaFlow Exhaust Muffler

2011–2025 Universal Fitment / Performance Exhaust System

Part #: 11365

Overview

The MagnaFlow 4x11x9-inch Oval Straight-Through Performance Exhaust Muffler is designed to elevate your vehicle's exhaust system with a combination of signature sound and proven performance gains. Crafted for enthusiasts seeking a deep, aggressive exhaust note and improved flow, this muffler is a versatile upgrade suitable for a wide range of vehicles. Whether you're looking to enhance your daily driver or boost your vehicle's sound and performance for spirited driving, this muffler delivers reliable, dyno-proven results.

Constructed with quality materials and engineered for durability, the MagnaFlow muffler helps support increased horsepower and torque while maintaining a refined, aggressive exhaust tone. Its universal design and flexible inlet/outlet configuration make it compatible with various exhaust setups, allowing for straightforward installation and customization. Perfect for those who want a balance of performance, sound, and durability, this muffler is an excellent addition to any performance-oriented build.

Key Features

The MagnaFlow 11365 muffler incorporates several advanced features that set it apart from standard replacements:

• Constructed with a free-flowing straight-through perforated stainless steel core wrapped in stainless steel mesh and acoustic fiber fill, ensuring optimal exhaust flow and sound quality.
• Reversible, universal 2.25-inch inlet and outlet diameter layout provides installation flexibility, allowing you to orient the muffler in the most suitable configuration for your vehicle.
• Designed with a durable stainless steel construction that resists corrosion and withstands high temperatures, ensuring long-lasting performance and appearance.
• Engineered to produce a signature MagnaFlow exhaust sound—deep, aggressive, yet refined—enhancing your vehicle's auditory presence.
• Dyno-proven to improve exhaust flow, supporting increased horsepower and torque for a more spirited driving experience.
• Ideal for enthusiasts who want a straightforward upgrade that combines performance, durability, and a distinctive sound profile.
• Universal fitment makes it suitable for a wide range of vehicles, providing versatility for custom exhaust builds.
• Designed for easy installation with minimal modifications required, making it accessible for both professional installers and DIY enthusiasts.

Construction & Design

The MagnaFlow 11365 muffler features a robust stainless steel housing and internal core, ensuring resistance to rust and corrosion over time. Its oval shape and straight-through perforated core design promote efficient exhaust flow, reducing backpressure and enhancing engine performance. The acoustic fiber fill dampens unwanted noise while amplifying the deep, throaty exhaust tone MagnaFlow is known for. The reversible inlet/outlet configuration offers installation flexibility, allowing you to adapt the muffler to your specific exhaust layout. Overall, the design emphasizes durability, performance, and a signature sound that complements a variety of vehicle styles.

Installation & Fitment

The MagnaFlow 11365 muffler is designed for straightforward bolt-on installation. Its universal 2.25-inch inlet and outlet diameters allow compatibility with many exhaust systems. The reversible design provides additional flexibility in orientation, simplifying the installation process. No cutting, drilling, or complex modifications are typically required, making it suitable for DIY installation or professional fitting. Properly installed, this muffler offers a significant upgrade in both sound and performance with minimal effort.

• Reversible, universal 2.25-inch inlet/outlet configuration for flexible installation
• Durable stainless steel construction for long-lasting performance
• Straight-through perforated core for optimal exhaust flow and sound
• Easy bolt-on installation with minimal modifications required

What's Included

• MagnaFlow 4x11x9-inch Oval Performance Exhaust Muffler
• Clamps and mounting hardware
• Installation instructions

Ideal For

• Performance enthusiasts seeking improved exhaust flow and sound
• Daily drivers looking for a durable, reliable upgrade
• Custom exhaust builds requiring a versatile, high-quality muffler
• Anyone wanting a deep, aggressive exhaust tone with proven performance benefits