Walker 18180 Exhaust Muffler

Walker SoundFX Universal Muffler for 1987-1991 GM Vans and SUVs

Walker SoundFX Universal Muffler Part Number 18180 is a universal-fit exhaust muffler built with 100% aluminized steel for improved service life versus low-carbon steel. It is shaped as an oval combination muffler with a 3-inch offset inlet and 3-inch center outlet, making it a practical choice for exhaust repairs and custom-fit applications on select Chevrolet and GMC vehicles.

Key Features

• Universal fit exhaust muffler for custom or replacement installations
• Oval body design with combination muffler construction
• 3-inch inlet and 3-inch outlet with pipe connection ends
• Offset inlet and center outlet configuration
• Aluminized steel body and finish for added corrosion resistance
• Mechanical interior joints and spun-locked heads for durability
• Walker SoundFX Universal product line focused on balanced acoustics and clean appearance

Product Details

The Walker SoundFX Universal line is built for drivers who need a serviceable exhaust muffler with straightforward dimensions and dependable construction. Part Number 18180 uses a steel body with an aluminized finish, an oval shape, 29-inch overall length, 22-inch body length, 9.75-inch body width, and 4.25-inch body height. The 3-inch inlet and outlet sizing supports exhaust work where a universal muffler is required, while the offset inlet and center outlet layout helps match common routing needs. This part cross-references Monroe Shocks & Struts 5564 for the same application.

Vehicle Fitment

• Fits 1987-1991 Chevrolet Blazer, N/A, with 3-inch inlet; modifications and/or additional parts may be required for installation.
• Fits 1987-1991 Chevrolet G10, N/A, modifications and/or additional parts may be required for installation.
• Fits 1987-1991 Chevrolet G20, N/A, modifications and/or additional parts may be required for installation.
• Fits 1987-1991 Chevrolet G30, N/A, modifications and/or additional parts may be required for installation.
• Fits 1987-1991 GMC G1500, N/A, modifications and/or additional parts may be required for installation.
• Fits 1987-1991 GMC G2500, N/A, modifications and/or additional parts may be required for installation.
• Fits 1987-1991 GMC G3500, N/A, modifications and/or additional parts may be required for installation.
• Fits 1987-1991 GMC Jimmy, N/A, with 3-inch inlet; modifications and/or additional parts may be required for installation.
• Fits 1987-1990 Chevrolet G20, N/A, single pipe replaces OE split design; with light duty emissions; with single catalytic converter; modifications and/or additional parts may be required for installation.
• Fits 1987-1990 Chevrolet G30, N/A, with single catalytic converter; without California emission system; modifications and/or additional parts may be required for installation.
• Fits 1987-1990 GMC G2500, N/A, single pipe replaces OE split design; with light duty emissions; with single catalytic converter; modifications and/or additional parts may be required for installation.
• Fits 1987-1990 GMC G3500, N/A, with single catalytic converter; without California emission system; modifications and/or additional parts may be required for installation.
• Fits 1991 Chevrolet G20, N/A, with light duty emissions; with single catalytic converter; modifications and/or additional parts may be required for installation.
• Fits 1991 Chevrolet G30, N/A, modifications and/or additional parts may be required for installation.
• Fits 1991 Chevrolet G30, N/A, with 3-inch system; modifications and/or additional parts may be required for installation.
• Fits 1991 GMC G2500, N/A, with light duty emissions; with single catalytic converter; modifications and/or additional parts may be required for installation.
• Fits 1991 GMC G3500, N/A, modifications and/or additional parts may be required for installation.
• Fits 1991 GMC G3500, N/A, with 3-inch system; modifications and/or additional parts may be required for installation.

Common Uses

• Replacing a worn or rusted muffler in a 3-inch exhaust system
• Restoring exhaust flow after muffler damage or internal failure
• Addressing exhaust noise from a deteriorated factory muffler
• Supporting custom exhaust routing where an offset-inlet, center-outlet layout is needed
• Servicing select Chevrolet Blazer, G20, G30, and GMC Jimmy, G1500, G2500, G3500 applications

Installation Notes

Because this is a universal muffler, installation may require exhaust fabrication, alignment, or additional parts depending on the vehicle and existing system layout. Confirm inlet and outlet diameter, offset, and overall length before installation. For listed Chevrolet and GMC applications, verify whether the vehicle uses a single catalytic converter, light duty emissions equipment, or a 3-inch system before ordering.

Quality Assurance

Walker SoundFX Universal mufflers use aluminized steel construction, mechanical interior joints, and spun-locked heads to support durability in exhaust service. The SoundFX Universal line is positioned for dependable fitment flexibility and consistent acoustics in replacement and custom exhaust work.