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🔊 Unleash the roar that sets you apart—Flowmaster 40 Series, where power meets precision.
The Flowmaster 40 Series Chambered Muffler features a durable 16-gauge aluminized steel oval body with dual 2.5" inlet and outlet pipes, delivering an aggressive yet refined exhaust tone. Designed for street, strip, and off-road use, its compact 19" length and fully welded construction ensure long-lasting performance and a perfect fit for cars and trucks seeking that iconic Flowmaster sound without drone.
| ASIN | B09BP6D6WM |
| Best Sellers Rank | #507,576 in Automotive ( See Top 100 in Automotive ) #533 in Automotive Replacement Exhaust Mufflers |
| Brand | Flowmaster |
| Brand Name | Flowmaster |
| Compatible with Vehicle Type | Car, Truck |
| Customer Reviews | 4.7 out of 5 stars 155 Reviews |
| Item Dimensions | 20.5 x 9.8 x 4.6 inches |
| Item Weight | 8.75 Pounds |
| Item dimensions L x W x H | 20.5 x 9.8 x 4.6 inches |
| Manufacturer | Flowmaster |
| Manufacturer Part Number | FLM-425404 |
| Material | Alloy Steel |
| Material Type | Alloy Steel |
| Model Number | FLM-425404 |
| Shape | Oval |
| Vehicle Service Type | Car, Truck |
D**E
Great American sound .
Great sound not to loud just right no horrible drone sounds perfect on my 2017 Nissan Titan XD
J**S
Sound good
Sound good on chevy 5.3
R**S
Good deal
Sounds really good on my tundra definitely worth it
C**G
Ok
Ok
N**H
Flow master
This muffler worked great on my 1999 Chevy Tahoe to make it duel exhaust I did have to adapt from 2 1/4 to 2 1/2 but I have a mig welder so no problem there sounds very good with duel pipes out the back only aggressive when I stand on the throttle otherwise sounds good and tough 😁
B**T
AMAZING SOUND
Installed this replacing the intermediate pipe and lately removed the end mufflers. Current config is: * Dual cat downpipes (its a V6) * Into Flowmaster 40 * Out to dual 2.5" exhaust tips Found this "squeezes" the sound making that more high pitched sound as you can hear in the video. It's a bit different from what I initially intended for my car (2017 - 3L V6 - Q7) but it worked out so good! It sounds total badass especially when upshifting and you hear that crack pops.... love it
F**Y
Fit's & Sounds Great
Bought this for my 2003 f150 XLT FX4. 2.5" in, 2.5" out. Sounds great. I bought this one for my truck 8 years ago and I bought it again in 2024. Can't be beat for the price.
J**J
L O U D
Wanted to add a more throaty note and the Flowmaster Flow40 did all that and more. Local shop zipped it in in just a few hours. Construction of the exhaust was great, especially at this price point. Hard to tell from the amazon description, but it's a true X-pipe design on the dual in dual out model. Now to see if there's a 4inch single pipe version for the Duramax.
A**N
Buena calidad
Tengo un V8 se escucha genial
Trustpilot
3 days ago
1 month ago