

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Thailand.
๐ Rev Up Your Ride with Flowmaster's Signature Sound!
The NEW Flowmaster 40 Series Chambered Muffler is engineered for performance enthusiasts seeking an aggressive exhaust tone. With dual 2.5" inlets and outlets, this universal muffler is constructed from durable 16 gauge aluminized steel and features fully MIG welded seams for maximum strength. Ideal for both street and off-road applications, it delivers the legendary Flowmaster sound without the worry of internal packing blowouts.
| 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 ๐
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
1 day ago
1 month ago