Walker 18886 Exhaust Muffler

Walker SoundFX Direct Fit Muffler for Maxima and I35

Walker SoundFX Direct Fit muffler Part Number 18886 is a specific-fit exhaust muffler for select Nissan Maxima and INFINITI I30/I35 applications. It uses 100% aluminized steel construction for improved service life versus low-carbon steel and is built for a clean OE-style appearance with controlled exhaust tone.

Key Features

• Direct-fit exhaust muffler for select 1999-2004 Nissan and INFINITI applications
• Oval body shape with a steel body and aluminized finish
• 2-bolt welded flange inlet with offset configuration
• Dual 2-inch outlet tips with offset outlet configuration
• Mechanical interior joints and spun-locked heads for added durability
• Walker SoundFX Direct Fit line focuses on fitment, appearance, and acoustics

Product Details

Walker 18886 is built for drivers replacing a worn or noisy factory muffler on the Nissan Maxima, INFINITI I30, or INFINITI I35. The combination muffler design, oval body, and direct-fit layout support a straightforward exhaust replacement while maintaining a factory-like look under the vehicle. This part cross-references AP Exhaust 38812 for the same application.

The SoundFX Direct Fit product line is Walker’s OE-style exhaust offering for buyers who want a replacement muffler that matches the original fitment profile and sound characteristics. For 2002-2004 INFINITI I35, 2002-2003 Nissan Maxima, 2000-2001 INFINITI I30, and 1999-2001 Nissan Maxima applications, Part Number 18886 provides a vehicle-specific solution rather than a universal muffler.

Common Replacement Reasons

• Rust or corrosion on the original muffler body
• Exhaust noise from a leaking or damaged muffler
• Broken internal baffles or deteriorated internal joints
• Poor factory exhaust appearance from age-related wear
• Need for a direct-fit replacement on a Nissan Maxima or INFINITI sedan

Installation Notes

Compatible With 2002-2004 INFINITI I35, 2002-2003 Nissan Maxima, 2000-2001 INFINITI I30, and 1999-2001 Nissan Maxima. Fitment notes include Federal Emission System and California Emission System coverage on select Maxima applications, with 1999 models requiring production after 04/1999. Verify inlet and outlet orientation, flange style, and overall dimensions before installation.

Quality Assurance

Walker builds this muffler with aluminized steel, mechanical interior joints, and spun-locked heads to support durability in everyday exhaust service. The SoundFX Direct Fit line is engineered for specific vehicle applications and consistent replacement fitment.