MagnaFlow Performance Exhaust Muffler

2011–2025 Subaru Forester / Subaru Impreza 2.0L Turbo / 2.5L

Part #: 18135

Overview

The MagnaFlow 3.5-inch Round Glasspack Performance Exhaust Muffler is designed for automotive enthusiasts who crave a deep, resonant sound and enhanced performance from their vehicle's exhaust system. Whether you're a street driver looking to add a classic muscle car tone or a hot rodder seeking a bold auditory presence, this muffler delivers on both sound and function. Crafted with precision and engineered for durability, it transforms your vehicle's exhaust note into a rich, throaty growl that turns heads and elevates your driving experience.

Built to support spirited driving and performance upgrades, this glasspack muffler helps improve exhaust flow, supporting increased horsepower and torque. Its weight-optimized design ensures minimal added mass while maintaining structural integrity, making it an excellent choice for those seeking a balance of sound, style, and performance. Easy to install and compatible with a variety of vehicles, this muffler is perfect for enthusiasts who want to unleash their vehicle's inner hot rod.

Key Features

The MagnaFlow Glasspack Muffler is packed with features that enhance both performance and sound quality:

• Constructed with a free-flowing, reversible straight-through design that maximizes exhaust flow and sound volume.
• 3.5-inch round body with a satin finish, combining durability with a sleek appearance.
• Single-stage packing material that produces a deep, classic glasspack tone, ideal for muscle car and hot rod applications.
• Engineered to deliver a bold, resonant exhaust note while supporting performance gains.
• Lightweight construction that reduces overall vehicle weight without sacrificing durability.
• Designed for easy bolt-on installation with standard 2.25-inch inlet and outlet diameters.
• Made from high-quality materials that withstand high temperatures and harsh conditions.

Construction & Design

The MagnaFlow 18135 muffler features a robust, satin-finished stainless steel body that ensures longevity and resistance to corrosion. Its round, glasspack-style design is optimized for maximum sound and flow, with a reversible configuration that allows for customization of exhaust tone. The internal packing is designed to produce a deep, throaty exhaust note characteristic of classic hot rods, while the free-flowing straight-through core minimizes backpressure and enhances engine efficiency. The lightweight construction contributes to improved vehicle handling and performance, making it a practical upgrade for performance-minded drivers.

Installation & Fitment

The MagnaFlow 18135 muffler is a straightforward bolt-on upgrade that fits standard 2.25-inch inlet and outlet exhaust pipes. No cutting, welding, or complex modifications are required for installation, making it accessible for DIY enthusiasts and professional installers alike. Ensure compatibility with your vehicle's exhaust system before installation. Properly securing the muffler with clamps and verifying alignment will ensure optimal performance and longevity.

• Easy bolt-on installation with existing exhaust piping
• No cutting, drilling, or tuning required
• Compatible with 2.25-inch inlet and outlet exhaust systems

What's Included

• MagnaFlow 3.5-inch Round Glasspack Performance Muffler (Part # 18135)
• Clamps and mounting hardware
• Installation instructions

Ideal For

• Performance enthusiasts seeking a deep, classic exhaust tone
• Hot rod and muscle car builders
• Street drivers looking for a bold sound upgrade
• Vehicles with 2.25-inch exhaust piping