Flowmaster 40 Series Delta Flow Mufflers Customer Reviews
63 Customer Reviews
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All the power and performance of Flowmaster's muscular mufflers without the roaring interior resonance-that's the idea behind their 40 Series Delta Flow Muffler. It's the ideal pick for late-model performance cars that want powerful exterior tone while enjoying a quieter ride.
At the heart of the 2-chamber design is Flowmaster's exclusive Delta Flow technology. This innovative engineering utilizes precision-placed deflectors that not only mute interior sound, they fuel increased exhaust scavenging for the most possible power.
Also ideal for dual exhaust cruisers, the Flowmaster 40 Series Delta Flow Muffler boasts the quality construction you'd expect from Flowmaster. Each Flowmaster muffler is built with 16-gauge aluminized steel or stainless steel for corrosion resistance and fully mig-welded for maximum durability. Best yet, your Flowmaster 40 Series Delta Flow Muffler boasts a 3-year warranty on aluminized and a Limited Lifetime Warranty on stainless steel.
63 Customer Reviews
Reviewed by Birgitta L (N. BARRINGTON, IL) Reviewed for a 1995 Lexus ES 300 — Apr 29, 2014 5:35 PM
The muffler is loud. I have a high flow resonator and it still has a lot of noise. It's a good sound but there is a lot of drone in low rpms. I can deffinetly feel a power difference. Overall it's good just a bit to much drone.
Reviewed by Mitch H (Overland Park, KS) Reviewed for a 2013 Dodge Ram — Dec 10, 2013 4:18 PM
This was a great addition to my Ram 1500 Express. Sounds great, turns heads down the road. Can't recommend it enough for anyone looking to get some great sound out of their truck.
Reviewed by Jason O (Oxford, CT) Reviewed for a 2013 Dodge Ram — Sep 03, 2013 5:30 AM
I am extremely pleased with this muffler. I purchased the single in (3") dual out (2.25") for my 2013 Ram 1500 with 5.7L Hemi. It fit perfectly, I needed about 1.5 to 2 feet of 3" pipe to make up the difference in length compared to the stock muffler which the dealer had for surprisingly cheap. As for the sound, its exactly what I was hoping for. Nice, aggressive take off volume but at highway speeds when the MDS kicks in its whisper quiet.
Reviewed by Kevin H (BELLAIRE, MI) — Jul 23, 2013 10:07 AM
I put on the 40 series muffler with stock pipe and it has a nice deep rumble. I was a simple install, just had to extend the tail on the muffler to use the stock tailpipe. Cost was very reasonable from autoanything.com.
Reviewed by Ray R (WESTERVILLE, OH) Reviewed for a 2011 GMC Sierra — Jul 02, 2013 10:48 AM
I had a local shop cut the stock muffler on my 2011 GMC Sierra and had this installed. I paid 70 to have it welded on the stock exhaust pipe and could not be happier. if you have my truck you will need the 3" center inlet with 3" offset outlet. There is some resonance inside the cab but nothing crazy that will disturb your conversation or phone calls. could not be happier with the delta flow.
Reviewed by Deneen W (Boca Raton, FL) Reviewed for a 2006 Ford Explorer — May 22, 2013 4:53 AM
I had the resonator and muffler (which are connected stock) Cut out and replaced with the 40 delta. The sound gave my ford explorer A much more aggressive tone with the 4.6 v8 and it doesnt drone at highway speeds. Worth the money.