The Flowmaster® Flow FX® Muffler delivers a deep, mellow, moderate performance tone for enthusiasts who prefer a smooth straight-through sound instead of the traditional “chambered” exhaust note. Inside, the muffler features a large 3.50-inch perforated stainless steel core surrounded by high-temperature sound absorption material, producing a refined yet aggressive tone under acceleration.

Built from fully MIG-welded 409 stainless steel, the Flow FX offers long-lasting durability and a clean, bright finish. The reversible straight-through design allows installation in either direction, making it adaptable for a wide range of custom builds. Ideal for drivers seeking a compact, show-quality performance muffler at an economical price point, this unit fits classic muscle cars, modern performance cars, trucks, SUVs, street rods, and street/strip setups.

Features

• Fully welded 409 stainless steel for durability and longevity

• Straight-through perforated core for maximum flow

• High-temp internal sound-absorbing material for tone control

• Moderate exterior sound with mild to moderate interior tone

• Reversible design for flexible installation

• Universal fit for a wide range of vehicles

• Flowmaster® quality construction

Specifications

• Inlet Diameter: 3.50" (Center)

• Outlet Diameter: 3.50" (Center)

• Muffler Type: Absorption (straight-through)

• Material: 409 Stainless Steel

• Body Length: 18.00"

• Overall Length: 24.00"

• Shape: Oval

• Sound Level: Moderate

• Clamping Type: Flat Band (clamps not included)

• Inlet/Outlet Connection: Slip-Fit

• Emission Code: 5

• Finish: Natural

• Universal Fit

Fitment 

Universal Fit Muffler
Fits vehicles requiring a 3.50-inch center inlet
Fits vehicles requiring a 3.50-inch center outlet
Fits classic muscle cars
Fits late-model muscle cars
Fits street rods
Fits street/strip vehicles
Fits trucks and SUVs