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Your cart is empty.The 70 series utilizes Flowmaster's Delta Flow technology and an enlarged case for improved sound control along with mileage and power gains. Perfect for use on trucks, SUV's, RVs, tow vehicles and high performance street cars where space allows. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
Jeremy Heaslip
Reviewed in Canada on October 4, 2023
This was just what I was looking for, installed on 2010 Sierra 5.3 with 3rd cat delete. Cruising speed has absolutely no drone, when you step on it you definitely know there is an exhaust on truck.
Brian Priddy
Reviewed in the United States on April 9, 2023
Not too loud but a mellow flowmaster note that is perfect for my tahoe.
Ben Raudebaugh
Reviewed in the United States on August 15, 2022
Sounds great on my 2018 ram 3.6 v6. A little more rumble than stock but not loud and annoying at cruising speeds.
Jeff in Topeka
Reviewed in the United States on August 14, 2022
This is just a bump up from a stock sound. I put this on my bone stock 2012 Chevy 1500 5.3 LTZ and I like it. It has a good sound with no cackle, I'm too old for that shiznit!!!
Michael M.
Reviewed in the United States on October 1, 2022
Not too loud, perfect. Still has a nice growl without inside drone. And I have 3’ from shorty headers all the way out the back.
Customer
Reviewed in Canada on August 11, 2021
Little louder then stock on ‘03 Yukon 5.3. But not too loud, no drone. Truck feels better and sounds better.
CCFBG Garage
Reviewed in Canada on November 5, 2020
Great product, i gave it 5 stars as it is a good product , i was worried about this muffler being too loud, not at all i should have bought a 50 series for a little more growl, the 70 is a good stock repalcement and sounds the same as stock but has much better flow
Greg D. Moon
Reviewed in the United States on October 9, 2020
installed as 3inch in and out... sounds GREAT and not loud in the interior... BUY these they are GREAT!!!
floyd luce
Reviewed in the United States on December 6, 2019
Used this to replace the mufflers on our Winnebago Motor home. It was an easy installation, as the 3 inch inlet and outlet matched up to the existing pipes. Much less expensive than the original mufflers if ordered from Winnebago.
Miles
Reviewed in the United States on December 28, 2018
I'm very happy with this purchase. I had to replace my stock muffler on a 2001 suburban due to a leak a few years ago. At the time I decided it would be nice to upgrade to a performance muffler. I looked at both this one and a comparable magnaflow. For whatever reason I got the magnaflow initially. It was meant to be used with suv's and not resonate. It ended up droning and resonating so bad inside I returned it. This is not meant to be negative towards magnaflow, just that one didnt work for me. I decided to weld the leak and just go with the old stock one knowing at some point the leak would begin again due to the location. Sure enough it did and this time I apprehensively bought the flow master 70 SUV assuming i would have the same issues, but thankfully its perfect. Inside it is hardly louder than stock. It has the true flow master rumble and sounds great at idle and acceleration. My wife hardly noticed a differance inside so thats a major test. Very happy with this muffler.
rdsully
Reviewed in the United States on July 21, 2012
2010 Silverado 5.3L, A/T,4WD. Was looking for better milage and a little more power for towing. DID NOT want a lot of noise. Installed a Flomaster 70, K&N air cleaner system, and Mitchlin tires. After 5000+ miles I have found the following:Amazon: Had the best price on both the muffler and air cleaner. Delivery was fast.Flowmaster 70: No increase in power. No increase in milage. Great sound -mollow. No sound unless under heavy power.K&N air cleaner: VERY LOUD under acceleration. Small gain in power. Small gain in gas milage (1.3 m.p.g.)Mitchlin M/S2: Amazing tires. Outstanding ride, small gas milage increase (1.7 m.p.g. highway. No gain in city driving)
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