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  1. #1
    Jr. Mechanic
    Join Date
    Oct 2009
    Fairbanks, Alaska

    Default Magnaflow or Flowmaster?

    This is my problem. I want to install some kind of cat back system. Right now I'm looking at magnaflow and flowmaster, but I am open to others.

    Situation: I want to install this myself since It looks pretty easy. I've read I have to cut the old oem system out, I do have a lift that will bring the truck over my head, but It's in the back of my hangar. This means I could slide it out potentially (I don't want to move any airplanes right now, its too cold outside I think I might lose $'s from the heat lost) I am going to weld them eventually, but when I can get the truck into my building. All I want is some nice tone and no to little drone, but all the while having a ballsy sound when I get on it. I'm thinking a single in dual out the back configuration. Also I don't know if weather makes a difference. I live in Fairbanks Alaska and it can get cold, there is snow. I don't think the roads are salted.

    Anything is helpful.

    2006 Chevy Silverado Z71 Crew Cab 5.3L
    Cat back would be the first non stock thing.
    Except for deck and home made front moose light bar.

  2. #2
    Jr. Apprentice Gnarnar's Avatar
    Join Date
    Feb 2009
    Woodland Hills


    Well you'll get more power out of the magnaflow and you'll get a decent sound out of it.

    Personally i like the sound of flowmaster.

    Its not a huge hp difference between the two with just a catback.
    'O8 Black Silverado Ext LT 4x4
    5.3L Vortec
    K&N Aircharger Intake
    Flowmaster Super 44
    Single Lock Snug Top
    Black Powder-coated Billet Grille
    Black Front Bowtie
    Eckhart Trailer Hitch
    Prodigy Brake Controller
    Valentine 1 w/ Mirror Mount
    Velocity 6000k H.I.D.s
    Tinted Windows
    Blacked Out Tail Lights/3rd Brake Light
    Pioneer AVIC F910BT
    2 13.5" JL WT5 Subs
    JL 750HD Amp (Subs)
    JL Audio Speakers
    200watt Amp (Speakers)

  3. #3


    I have a borla exhaust on my 08 silverado that i like but i like flowmaster as well!!
    If you find yourself slipping,.....tie a knot.....hold on tight

    2008 silverado
    1500 crew cab
    5.3 L 4x4
    Borla exhaust, rbp black tip
    tint, bed liner
    2.25 in ready lift leveling kit
    18x9 rbp 94r
    33x12.5x18 toyo mts

  4. #4


    borla exhaust

  5. #5
    Legend s5belford's Avatar
    Join Date
    Apr 2009
    Kalamazoo Michigan


    I got the flowmaster knockoff from the local muffler man installed for $125. I love the sound, and the price, overall I'm very happy with my decision.

    I just couldn't bring myself to spend $500+ just for the brand


    2009 Silverado LT1: All Star Edition
    5.3 Liter V8 4x4

    Locking Rear Differential
    3.73 Rear Axle
    Fog Lamps
    Factory Remote Start
    Locking Tailgate
    20" Wheels

    Rear Wheel House Liners
    Molded Mud Flaps
    Stainless Nurf Bars
    Driver Information Center
    20% Tinted Windows
    Low Profile Diamond Plate Tool Box
    GM Bed Liner
    Silver Birch Metallic Mirror Covers
    Silver Birch Metallic Vent Visors
    Flowmaster Super 40 (knock off)
    20" Wheels
    Bed Rail Protectors
    Extang Tonneau Cover

  6. #6
    Jr. Mechanic
    Join Date
    Oct 2009
    Near the beach!


    I also like the sound of Borla, then Magnaflow because they do have a good horsepower boost but it's not as loud, but Flowmaster also sounds good but has a decent drone to it. I suggest that if you trailer anything for long periods of time, don't make your exhaust go out the back, let it behind a rear tire or something like that. Also I wouldn't go through the name brand either, although you do get a warranty you still could get the name brand for half price and still know that you got the name brand for half the price and how can a bunch of pipes mess up? lol My vote is Borla or Magnaflow.

    2003 Silverado 1500
    Superchip Programmer
    20" Black Powdercoated Silverado SS Rims
    35 watt 5000k Low Beams
    55 watt 6000k High Beams
    Functional Ram Air intake with K&N filter
    Custom Side Exit Exhaust
    3% Window Tint
    Custom Painted Grill
    Halo Projector Fog Lights
    Outdoor Soundsystem
    2 12" Kenwood Carbon Fiber Cone Subs
    Custom Black Headliner


  7. #7
    Jr. Mechanic
    Join Date
    Oct 2009
    Fairbanks, Alaska


    Thanks for all of your posts. I bought a Magnaflow cat back kit and I will be installing it soon. I'm thinking about posting a comprehensive youtube video. Maybe.

    Thanks Again Everyone

  8. #8


    definitely shoot us the video. You'll be very happy with the Magnaflow - and with snowy roads you'll be glad you went with name brand for the warranty.
    If you have spent more on your pickup than on your education, then you might be a redneck.

    2005 Chevrolet Silverado 1500 Crew Cab Z71 4x4
    - 6" Pro Comp Stage 1 Suspension Lift
    - Pro Comp Level-Lift Kit
    - Hercules Terra Trac A/T 315/70/17 tires
    - Pro Comp 6089 brushed chrome wheels
    - Flowmaster Force II 3" Cat-back Exhaust
    - Firestone Sport-Rite dual airide springs

    Preserve our rights: |

  9. #9


    Flowmaster, all the way! 40 Series, you won't regret it!

  10. #10


    I have a 99 2wd with 5.3v8. I had true duals put on with magnaflow mufflers (the middle length of case). I don't have any tooling to bend pipe so I had a shop do it. If you cut the y-pipe just b4 it merges into 1 and continue back with 3" the whole way you'll get true duals and much better sound.
    For the true duals 3" stainless plus 2-$140 magnaflow mufflers I had it installed for $600 not including tips that I bought elsewhere.
    Great grumble at idle, not too loud at cruising speed and sounds bad ass when you romp on it!

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