Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
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Features, Description, Q&A, Specs & Installation
| Brand | Flowmaster |
| Muffler Inlet Size | 2.50 Inch |
| Muffler Installation Type | Clamp-On Muffler |
| Muffler Type | Chambered Muffler |
Classic Muscle Car Sound. The Flowmaster 40 Series Dual In/Center Oval Muffler is designed to deliver the aggressive exhaust note that enthusiasts crave. Known for its deep, throaty growl and strong resonance inside the cabin, this muffler is a popular choice for muscle cars, trucks, and off-road builds. Whether you're hitting the street or tearing up the track, it provides the bold performance tone Flowmaster is known for.
Construction and Appearance. Built from fully welded 16-gauge aluminized steel, the 40 Series muffler is engineered for durability and performance under high-heat conditions. The dual inlet/center outlet oval design supports a wide range of custom setups, while the corrosion-resistant finish ensures longevity even in demanding environments. Its compact shape allows flexible installation while maintaining high flow efficiency.
Installation. Installation is straightforward for experienced builders and muffler shops. As a universal-fit component, some adaptation such as custom piping or hanger adjustments may be required depending on vehicle configuration.
Warranty. This product is backed by a Three-Year Limited Warranty from Flowmaster, covering materials and craftsmanship.
Application. This Flowmaster 40 Series Dual In/Center Oval Muffler features universal fitment; some adaptation may be required depending on your vehicle's exhaust layout.
Flowmaster 425403
CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation Info
Installation Time
(approx) 1 Hour
Difficulty Level:
Simple installation for anyone.
Installation Guides
No guide available for this part yet.
What's in the Box
Tech Guides: