Walker 18919 Exhaust Muffler

Walker SoundFX Direct Fit Muffler for Altima

Walker SoundFX Direct Fit muffler Part Number 18919 is built for specific vehicle applications and is listed for 1998-2001 Nissan Altima models. It uses an oval steel body with an aluminized finish to support longer service life than low-carbon steel designs, while maintaining a clean OE-style appearance and controlled exhaust sound.

Key Features

• Direct-fit exhaust muffler for specific applications
• Fits 1998-2001 Nissan Altima
• Oval body design with 11-inch body width
• Aluminized steel construction for improved corrosion resistance
• Mechanical interior joints and spun-locked heads for added durability
• Single 2-inch inlet and single 2-inch outlet
• Offset inlet and offset outlet configuration
• Combination muffler design for balanced exhaust tone

Product Details

Walker SoundFX Direct Fit mufflers are part of Walker’s SoundFX Direct Fit line, which focuses on OE-style replacement exhaust components with a practical balance of appearance, fit, and acoustics. This muffler, Part Number 18919, is engineered with 100% aluminized steel and a steel body to help resist wear in everyday driving conditions. The oval case measures 29.25 inches overall, with a 17-inch body length and 5.5-inch body height, and it uses pipe-connection inlet and tip-style outlet connections for a specific fit on the Nissan Altima platform.

This part cross-references AP Exhaust 700406 and BRExhaust 145-761 for the same application.

What It Helps Address

• Exhaust noise that has become louder or harsher over time
• Rust-related muffler deterioration on an older Nissan Altima exhaust system
• Need for a direct-fit replacement muffler with OE-style dimensions
• Exhaust system repair after a failed or damaged factory muffler
• Fitment concerns when replacing a worn muffler on 1998-2001 Nissan Altima models

Installation Notes and Tips

Compatible With 1998-2001 Nissan Altima, N/A. Verify inlet and outlet diameter, offset configuration, and overall length against the existing exhaust layout before installation. Because this is a specific-fit muffler, matching the vehicle’s original routing and connection style is important for proper alignment and sealing. Part Number 18919 is intended for direct replacement use on the listed Altima applications.

Quality Assurance

Walker SoundFX mufflers are built with aluminized steel, mechanical interior joints, and spun-locked heads to support durability and consistent fit. The SoundFX Direct Fit line is positioned for replacement use where controlled acoustics and a clean appearance are important.