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  1. #1

    Default Cat Back Dual Exhaust

    2009 5.3 Silverado 4x4

    Looking into having duals installed.

    Cat Back to MagnaFlow muffler, splits into duals to the rear.

    No true duals, but Duals..

    Good....

    Bad....

    Okay....

    What Say You?


    2009 Silverado LT 5.3 V8
    2007 Mustang V6 4.0 (Best ET 11.927@117.74mph)
    1999 VW Herbie Jr.

  2. #2
    Sr. Engineer Joethepoolguy's Avatar
    Join Date
    Feb 2010
    Location
    Leon, NY
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    Default

    You should like it. I t will flow, sound, and perform better. Your truck will have a noticable difference. Duals always look better then one single pipe sticking out there!!!!

    2004 Silverado 2500HD LT 4x4 QuadraSteer
    6 liter w/ Comp Cam
    Stainless Steel Headers
    K&N Panel Filter W/Airbox Mod
    A/C Iridium Spark Plugs
    SCT Power Programmer
    MPT Custom Tune
    MagnaFlow Dual Exhaust
    Cobra 29 LTD Bluetooth CB
    Custom Badges
    3" Rear, 2" Front Rough Country Suspension Lift
    33x12.5x33 M/Ts

  3. #3

    Default

    Quote Originally Posted by Joethepoolguy View Post
    You should like it. I t will flow, sound, and perform better. Your truck will have a noticable difference. Duals always look better then one single pipe sticking out there!!!!
    Correct. Except for the duals looking better part ;)

  4. #4

    Default

    I put a cat back on my '94 Silverado with good results. The sound was better and the power was noticeable. I replaced it w/ a single outlet exhaust, but I was still pleased.
    Remember to have the exhausts exit out the sides since it looks like you will be towing a trailer (An 11 second 6 cylinder?!! Hot Dawg!)

  5. #5

    Default

    If you are referring to me with the 11sec V6, it's far from it But single exhaust for the win !!!!!

  6. #6

    Default

    You will like it...I have the same set up except I have a Flowmaster 40 series muffler.

    Bobby - North Carolina
    2008 4x4 5.3L V8
    6" Suspension Lift and 1.5" Body Lift
    20x9 Ballistic Jesters w/35" Toyo Open Country MT's & 1.5" rear wheel spacers
    4:56 Yukon Gears
    Hypertech Speedometer Calibrator
    Baja style bed mount spare tire carrier
    Flowmaster 40 series dual exhaust
    Recon Smoked LED tails/3rd brake lights/black projectors w/switchback LED's in the corners
    N-Fab Nerf Steps
    K&N CAI
    No Fear Pedals
    Tint, Line-X bedliner, Window visors, Rear wheel well liners
    Painted front grill, bow ties and door badges, de-"lettered" tailgate
    Powder coated front and rear bumpers

  7. #7
    Master Mechanic Silverado Junkie's Avatar
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    Feb 2010
    Location
    Lead Hill, Arkansas
    Posts
    541

    Default

    You will like the power and sound from your new exhaust. The only thing i dont like about cat-back exhausts is they connect to yor cats, cats are bad. Might as well put sand in your oil or water in your gas tank. LOL.
    1995 Silverado,Z71, 3-inch lift,2-inch leveling kit, SkyJacker Suspension, short ram-air intake, throttle body spacer, MSD ignition coil, straight pipes

  8. #8

    Default

    Quote Originally Posted by TYMBOM View Post
    If you are referring to me with the 11sec V6, it's far from it But single exhaust for the win !!!!!
    You have a methanol injection V6 Silverado?

    Very Interesting....


  9. #9

    Default

    You might experience a slight drop in low-end torque though with the duals. Don't ask me personally why, just it happened to me when I installed them and I've read in a few places here about people having the same problem. Put on an intake and had it custom tuned and that seemed solve some of the problem.
    2004 Silverado Z-71 Ext. Cab
    Volant CAI
    Flowmaster american thunder dual exhaust

  10. #10

    Default

    Finally got around to installing my Flowmaster American Thunder cat back on my 06 Sierra. Did it in my driveway. Would have been quick and easy had one of the cat flange bolts not snapped off. Anyway, the exhaust has the super 40 series muffler. Great sound when you get on it, but surprisingly little drone while cruising at highway speeds. Chrome tips can be side or rear exit. Overall, very pleased for just over $350 bucks.
    2006 GMC Sierra 1500 SLE X-cab Z-71
    Silver Birch Metallic, Line-X bedliner, Flowmaster American Thunder Cat-back, iPod integration kit, more to come soon!

    2006 Dodge Charger Daytona R/T
    Go ManGo!, SRT-8 hood, 20" Sport Muscle BHP Anthracite wheels, Mopar iPod integration kit

    :fighting0037:

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