Flowmaster Super 40 Series Mufflers Customer Reviews
131 Customer Reviews
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When sound and power matter most for your high-horsepower ride, pick the muffler that built Flowmaster's legendary reputation and unique tone. The Flowmaster Super 40 Series Muffler runs deeper and more powerful than any other street muffler out there-even Flowmaster's famed American Thunder 40 Series.
What's even more amazing about the Super 40 is the balance of deep Flowmaster tone and reduced interior resonance. Thanks to exclusive Gen II Delta Flow technology, the Flowmaster Super 40 Series Muffler employs precision deflectors in the 2-chamber design that keep powerful sound mostly outside.
Also ideal for dual exhaust cruisers, Flowmaster Super 40 Mufflers boast the quality construction you expect from Flowmaster. Each Flowmaster muffler is built with 16-gauge aluminized steel for corrosion resistance and fully mig-welded for maximum durability. Best yet, your Flowmaster Super 40 Series Muffler comes with their original black case and boasts a 3-year warranty.
131 Customer Reviews
Reviewed by Thomas P (SPRING, TX) Reviewed for a 2011 Chevy Silverado — Aug 05, 2014 7:48 AM
Very nice smooth sound. At one point on a previous truck there was no muffler and i loved the sound, except for the downshift it sounded horrible. Now with this flowmaster super 40 muffler i have decent sound that is not to loud inside the cab. Great muffler plan on putting h-pipe on next and will buy another soon . :)
Reviewed by Matt K (EARLVILLE, IL) Reviewed for a 1997 Chevy C/K 1500 — Jul 09, 2014 6:38 AM
I bought a di/do super 40 5 yrs ago and it completely rusted out on me. I bought the same thing again except in SS this time to prevent the rust. I now have dual turn downs instead of dual tail pipes and it is slightly louder and definitely deeper sounding. Since I've been running this muffler for 5 yrs I have noticed an increase in hp and mpg went up by 3-4 both on and off the highway. Easy to install as well took two hrs counting taking the old system off and putting the new one on.
Reviewed by john s (BEAUMONT, TX) Reviewed for a 1989 Chevy S10 Pickup — May 14, 2014 6:23 PM
AFTER INSTALLING MY NEW MUFFLER AND ADDED 3FT. OF STRAIGHT PIPE PER SIDE I COULDN'T WAIT TO FIRE MY TRUCK UP AND HEAR THE NEW SOUND ---AWSOME !!!! THEN I HAD TO SHARE "WOW" thats what i heard ... satisfied > yes <, ease of instalation > yes <, recommend it-- again > yes <.