Flowmaster Super 40 Series Mufflers Customer Reviews
119 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.
119 Customer Reviews
Reviewed by Devin O (PENSACOLA, FL) Reviewed for a 2004 Dodge Ram — Jan 06, 2014 9:29 AM
I ended up not installing the muffler due to a change in heart, which is why I only rated a one star for the ease of installation. That being said, the order process was smooth and the item came on time and in perfect condition. I will definitely do business with autoanything again.
Reviewed by Matthew N (St. Louis, MO) Reviewed for a 2009 Chevy Silverado — Jan 03, 2014 10:46 AM
The muffler sounds great on my silverado. The only issue is the exact fit isn't exact, the inlet pipe is 3" the outlet is 2 3/4" I just went to carx and had them make me a 3 to 2 3/4 section to bridge the gap and size difference.
Reviewed by Andrew V (EAST WINDSOR, CT) Reviewed for a 2013 GMC Sierra — Oct 11, 2013 8:04 AM
Shipped very fast i literally got an email saying it was shipped and a txtfrom my wife that it was delivered at nearly the same time. Noticeable better gas mileage i had the same muffler on my last gmc truck and will continue to use super 40 mufflers