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🔥 Own the road with the legendary Flowmaster roar!
The Flowmaster 425404 40 Series Exhaust Muffler is a fully welded, 16 gauge aluminized steel muffler designed for universal fit. It delivers an aggressive exterior exhaust tone with noticeable interior resonance, making it ideal for street, strip, and off-road use. Known for its durability and iconic sound, it’s the go-to choice for drivers seeking that classic Flowmaster rumble.












| ASIN | B01IDDG3V0 |
| Automotive Fit Type | Universal Fit |
| Best Sellers Rank | #19,539 in Automotive ( See Top 100 in Automotive ) #34 in Automotive Replacement Exhaust Mufflers |
| Brand | Flowmaster |
| Configuration | Dual/Dual |
| Customer Reviews | 4.7 4.7 out of 5 stars (119) |
| Date First Available | July 19, 2016 |
| Exterior | Painted |
| Global Trade Identification Number | 00700042026029 |
| Inlet Connection Size | 2.5 Inches |
| Is Discontinued By Manufacturer | No |
| Item Weight | 10.25 pounds |
| Item dimensions L x W x H | 20.5 x 10 x 4.5 inches |
| Item model number | 425404 |
| Manufacturer | Flowmaster |
| Manufacturer Part Number | 425404 |
| Model | 425404 |
| OEM Part Number | 425404 |
| Product Dimensions | 20.5 x 10 x 4.5 inches |
| Shape | Oval |
| UPC | 700042026029 |
| Vehicle Service Type | Car |
A**M
Best bang “rumble” for the buck
C**N
This muffler isbadass. It sounds awesome!
J**S
Great muffler
P**N
Great product
A**R
Made it sound good
Trustpilot
3 days ago
2 weeks ago