Walker 18111 Exhaust Muffler

Walker SoundFX Universal Muffler 18111

Walker SoundFX Universal Muffler 18111 is a universal-fit exhaust muffler built for a wide range of classic and light-duty applications. It uses 100% aluminized steel for improved service life versus low-carbon steel and is shaped to deliver a clean appearance with controlled exhaust acoustics.

Key Features

• Universal fit exhaust muffler for custom and replacement applications
• Oval body design with a 26-inch overall length
• 2.25-inch offset inlet and 2-inch center outlet
• Aluminized steel body and finish for corrosion resistance
• Mechanical interior joints and spun-locked heads for added durability
• Combination muffler design for balanced exhaust tone

Product Details

Walker SoundFX Universal Muffler 18111 is part of the SoundFX Universal line, a product family focused on practical exhaust replacement for vehicles that need a universal muffler layout rather than a direct OE-style shell. The oval steel body measures 18 inches long, 8.813 inches wide, and 4.25 inches high, with an offset 2.25-inch inlet and a center 2-inch outlet. That configuration makes it a strong option for custom exhaust work and for vehicles listed in the fitment data, including Chevrolet S10, GMC Sonoma, Ford E-250 Econoline, and Dodge Caravan applications. This part number, 18111, is also cross-referenced to CSF 3757 for the same application.

Common Uses

• Replacing a worn or rusted muffler that has become noisy
• Restoring exhaust flow after a damaged or leaking muffler
• Addressing drone, rattling, or excessive exhaust noise
• Supporting custom exhaust routing on universal-fit builds
• Serving fitments such as 1973-1974 Chevrolet Malibu, 1988-1991 Chevrolet S10 Blazer, and 1975-1983 Ford E-150 Econoline

Installation Notes

Installation may require extension pipes, brackets, shields, straps, or other additional parts depending on the vehicle and exhaust layout. Fitment notes also call out applications that require specific components such as 35413 or 35917, and some vehicles require an 18-inch muffler body. Verify inlet and outlet sizing, offset location, and available clearance before installation. Because this is a universal muffler, final fitment should be matched to the vehicle’s exhaust routing and existing pipe dimensions.

Quality Assurance

Walker SoundFX mufflers are built with aluminized steel construction, mechanical interior joints, and spun-locked heads to support long-term durability in exhaust service. The design focuses on dependable fitment, stable construction, and consistent acoustics across a broad range of classic Chevrolet, GMC, Ford, Chrysler, Dodge, Plymouth, Buick, Oldsmobile, Mercury, and Pontiac applications.