Flowmaster 42541 40 Series Chambered Muffler

4.7 4.7 out of 5 stars | 361 ratings

Price: 89.95

Last update: 12-14-2024


About this item

Durable fully welded 16 gauge aluminized steel
Aggressive Sound Exterior Exhaust Tone
Noticeable interior resonance
Excellent Street/Strip and Off Road application

Product information

Technical Details


Top reviews from the United States

El Sob
5.0 out of 5 stars Beautiful, muscle car sound ????
Reviewed in the United States on June 29, 2024
I have been chasing this sound for many years. I finally have it. I am extremely happy with the mufflers ????
jimbo
5.0 out of 5 stars Nice sound
Reviewed in the United States on May 31, 2024
Easy install...sounds great...no inside cab droan...definitely more power
Tammy Jean Fiske
5.0 out of 5 stars Good low tone on a 2000 Toyota 4Runner
Reviewed in the United States on January 29, 2022
Has a good low tone on a 2000 Toyota 4Runner with a 3.4L V6 not to loud but noticeable, is 5 inches shorter than stock muffler will need extra exhaust pipe for installation overall a good product for the price.
Benzito
5.0 out of 5 stars Jeep Grand Cherokee 5.7 Hemi
Reviewed in the United States on November 19, 2023
Amazing sound for my custom exhaust setup.
Customer image
Benzito
5.0 out of 5 stars Jeep Grand Cherokee 5.7 Hemi
Reviewed in the United States on November 19, 2023
Amazing sound for my custom exhaust setup.
Images in this review
Customer image
Nick Radosta
5.0 out of 5 stars Sounds great, dented both mufflers in in shipping
Reviewed in the United States on July 9, 2022
Flowmasters are good, both mufflers were dented pre Amazon packaging I believe, they are going on a 50k show car and need them for the car show this weekend, no time to return or exchange. Pretty disappointed in packaging and shipping. Flowmasters are good sounding parts, nothing to complain on the brand itself.
1970 mustang, with a built 351C, gives it the classic muscle car sound, will be hitting the dyno next week to see if I loose or gain any HP
Customer image
Nick Radosta
5.0 out of 5 stars Sounds great, dented both mufflers in in shipping
Reviewed in the United States on July 9, 2022
Flowmasters are good, both mufflers were dented pre Amazon packaging I believe, they are going on a 50k show car and need them for the car show this weekend, no time to return or exchange. Pretty disappointed in packaging and shipping. Flowmasters are good sounding parts, nothing to complain on the brand itself.
1970 mustang, with a built 351C, gives it the classic muscle car sound, will be hitting the dyno next week to see if I loose or gain any HP
Images in this review
Customer image Customer image
Daniel M.
4.0 out of 5 stars Smooth sound
Reviewed in the United States on February 6, 2015
I bought this muffler for my 2011 F-150 5.0 Super Crew. I kept the stock resonator on and had a turn down right after the rear axle. I kept the resonator because I have a 6 month old and I did not want it to be too loud. It has a nice smooth tone, and you know it's there when driving and idling. I gave it four stars because as soon after I put it on my gas mileage dropped 2-3 mpg, and no it's not from led footing it. I was driving the speed limit and using cruise control. After a couple of days of driving my mileage was back to normal. Guess it just took a couple of days for all 123 computers on the truck to learn something was different. But it has a great deep sound.
Toobroketoretire
5.0 out of 5 stars Fantastic mufflers
Reviewed in the United States on September 26, 2011
I'm running a 454" powered '71 Corvette that has a high-performance factory cam, a high-rise Edelbrock intake, and a 3310-2 Holley carburetor. Up until now I had a set of stock mufflers on it and it would fall flat on it's face at around 3600 rpm. After installing these 40-Series Flowmasters it blasts up to it's 5500 rpm red line with no signs of exhaust restriction whatsoever. And as I'm also running a heavily-modified TH700R4 the amount of exhaust drone at cruising speeds is very small. For those of you who want a very decent street/strip muffler at an affordable price these 40-Series Flowmasters are the way to go. And with the free shipping they're even better.
Chuck
5.0 out of 5 stars flowmaster quality
Reviewed in the United States on August 3, 2020
good solid muffler i have not installed it yet but it should fit perfect would recommend this muffler to anybody wanting to make they truck to sound loud and aggressive ????

update. i welded this muffler on my 2000 F-150 V8 and it fits perfect thought it was going to be allot louder but its not much more louder than the stock muffler its got a nice rumble when you accelerate fast overall its i good muffler for someone wanting there truck have a rumble but not an obnoxious loud ????

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