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  1. #1

    Default 2010 Silverado Flex Fuel Muffler Suggestions.....?????

    I want a nice low rumble to my truck, not high pitched. I was told that the flex fuel trucks didn't sound good with a flowmaster muffler. Any suggestions?

  2. #2
    Jr. Apprentice rutroe's Avatar
    Join Date
    Oct 2010
    Schertz, Tx


    It's not the's the active fuel management that makes it sound weird. I had Flowmasters on mine before I switched to Magnaflow. It sounded alright. It didn't sound good when in V-4 mode and I don't think anything will fix that except turning AFM off.
    07 Silverado Z71, 6.0L, Turbonetics T-76 @ 10 psi, 75-shot, Comp 212/216 .560, 4L80, Yank 3000, meth injection, Magnaflow dumped, e-cutout, Nelson tuned

    Best time: 12.99@112

  3. #3


    Try a Dynomax #17233 Ultra Flo Welded muffler. 3" inlet and outlet. 20" body length. Stainless steel. Rumbly. Handles that 4-cylinder drone just fine.
    The Cheap-*ss Modder & Thread Killer
    The Realist says, "The glass is too big".

    2013 GMC Sierra 1500 SLT Z60 4WD Crew Cab
    Mineral Green Metallic w/ Tan Leather Interior
    5.3 L FLEX w/AFM, 6A, Cheap-*ss Mods
    32 Dump Club Member
    Range V8 AFM Eliminator

  4. #4


    screw it just run cats only... with the right tip it takes away the raspy noise that you get from running it with out a muffler the only time it gets anoying loud is when you put your foot to the floor, but if you take it easy it sounds like its got a muffler
    2000 single cab short bed 1500 w/ 6.0 vortec maxx swap from a 2006 2500, custom intake, slotted brakes, shorty headers, 8mm wires, electric fan, strait piped, 4.5 inch lift, asp pulleys, true dual through body exhaust, built trans w/ shift kit, custom tune ... 320rwhp

  5. #5
    Sr. Apprentice
    Join Date
    Oct 2010
    Panama City Beach, FL.


    Check out this thread...
    It's a nice set up and you can also hear it on youtube. Perhaps you could PM the one who started the thread and ask them your questions. Hope this helps... I am looking to have a new exhaust system added in the near future, just have to get some headers first... Show us some pics!!!!!!
    GO GATORS!!!
    2010 Chevy Silverado LT 4x4 Z71 Crew Cab
    5.3 L Vortec V-8
    Skid Plates
    Bluetooth, Steering Wheel Controls, Adjustable Pedals, all the goodies...:happy:
    Everything stock...

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