Your cart is empty.
Your cart is empty.The Super 40 features Flowmaster's Delta Flow technology. It's larger case profile provides the best of both worlds of performance and sound. The Super 40 has the deep powerful sound of the original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow technology. Constructed of 16-gauge aluminized steel and fully MIG-welded for maximum durability.
Courtney
August 2, 2025
The media could not be loaded.
BW
July 12, 2025
Put this on my 2015 silverado and sounds awesome, loud when you want it to be and quiet when on highway or pulling a load. Awesome bang for buck!
Ryan
July 1, 2025
Arrived early, had it professionally installed and it’s great so far. Good sound and deep resonance but very little noise in the cab at cruising rpms.Would definitely recommend!
mark
June 23, 2025
Exactly what I was looking for, not too crazy loud but enough rumble
Simon
June 17, 2025
great sounding muffler on the 4.8L. this is my 2nd one (first one dinged up taking it offroad) and I highly recommend if you like a semi quiet deep grumble.
Customer
May 16, 2025
Put it on my 08 GMC Sierra. Very nice aggressive tone like it says, neighbors aren’t as happy as I am though!
Mrs. Susan Hart
April 15, 2025
Bought by my son for his truck - he was completely happy with the purchase and it was easy to install.
Customer
March 11, 2025
awsome sound and I actualy believe better fuel mileage because lower rpm at higher speed but like to make it loud when I can
Alfonso Galindo Cisneros
February 12, 2025
Ideal para la chevrolet 5.7 9 cilindros. El sonido es bastante agresivo y al interior igual. Si te gusta un sonido fuerte ests es opción. Sueña más grave que el 40 series.
Jason M. Bienko
January 19, 2025
First off the shipping on this flowmaster was 2 days with free shipping. I was very impressed how fast I received it. As soon as it arrived I brought The Silverado (Silvia) in to get it installed. I called around and the cheapest I could find was 75 dollars. They do need to cut and add some extra pipe for the flowmaster to fit. Took them about 20 minutes and they fired up Silvia. Silvia sounded like the gates of hell opened up and she came out the door. He pulled up and said would you like the honors of the first rev? Damn right I did!! Silvia was perfect. The sound when first started is amazing really brings out the V8 power. At idle Silvia has a low purr. When you drive off you DO hear it in the cab but nothing to over powering. It's not loud enough to wake the neighbors. (Unless you wanted too) I did not want to have Silvia too loud and over power conversations in the cab or the radio. I park and sit in my truck de about 10 minutes before going into work so I didn't want Silvia to be too loud. The sound is perfect for what I was looking for. Between 20 and 30 MPH while driving regular (no bashing the gas) it does over power the cab a bit but once you get to the 45, 55 all up to 70 you have to bash the pedal a bit to make it loud. I'm my eyes, good price, perfect sound.
Sam
December 20, 2024
Sound is very deep, definitely will let people know you're there without being obnoxious.
Wm
November 20, 2024
It was everything that I was expecting it to be. The sound is great I love it.
TD
October 25, 2024
When the muffler arrived I was surprised at the quality of construction. This is no flimsy lightweight muffler. It is a beast. I had my local exhaust shop weld it on and threw a single side exit in front of the rear passenger wheel. It sounds amazing. Like the other reviews, it is not obnoxious, sounds deep and smooth. It will kick into v4 mode and drone just a bit but that’s easily resolved by smashing the pedal and unleashing that rich beautiful V8 sound!!!! Buy it if you want to sound like you own a V8!UPDATE* Bought the AFM disabler and it took the drone away. Now it rides in V8 mode and I get the full potential of this muffler. The disabler is a must have in my opinion.
Recommended Products
$179.28
$ 71 .28 $71.28