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  1. #1
    Jr. Mechanic drillbit26's Avatar
    Join Date
    May 2009
    Location
    Floyd, Virginia, United States
    Posts
    124

    Default Exhaust Confusion

    I really want to change my exhaust on my 2007 new body style silverado. its the 5.3 engine and it cuts back to 4 cyl from 8 when cruising. Now the confusion, I have been told if you put on dual exhaust it will sound like a helicopter when it goes from 8 to 4. So with that said what are my options, do you have to get a tuner to turn this feature off? Can I just cut off the muffler, please help. hopefully this makes sense. I have always had true duals on my other trucks and this truck has been quiet way to long. thanks
    2006 Silverado 2500HD, 6.0 Vortec, rhino spray in bed liner, LT package, westin step bars,true dual exhaust
    Mods to come: dixie horn, blacked out bowtie, recon smoked cab lights, recon led brake bar.
    Thank you lord:sign0011:

  2. #2

    Default

    Yes they do sound funny when there running in the 4cyl. mode. A Diablo Preditor can be used to turn off the DOD, plus you can adjust your LongTremFuelTrims (LTFT's) this helps with mpg's, throttle response and all around performance. Plus you have many other mods you can do with it.

  3. #3

    Default

    I installed a Magnaflow Duel exhaust on my '10 GMC Sierra with the 5.3L and Variable Valve Timing. When in V-4 mode, I do notice a deeper thrum in the exhaust noise that reminded me more of a prop plane at cruising speed. I will say though that with the system I had installed, the sound change is very subtle, and not that loud. After working closely around aircraft for a good 3 years on a carrier, I do find the sound quite soothing!

    2010 GMC Sierra 1500 SLE Extended Cab Z71 4X4 5.3L Flex Fuel
    MagnaFlow single in duel out system
    Volant CAI & Ram Air Scoop with Power Core Filter
    Rhino Tuff Grip Spray in Bed liner
    Undercover Classic Tonneau
    Trail FX Bug "deflector"
    AVS Window Deflectors
    Black Powder Coated Nerf Bars
    RECON L.E.D. Interior, 3rd Cab light, Projector headlights, and Taillights
    ATX Crawl Wheels wrapped in BFGoodrich Rugged Terrain tires
    CalTrend Neoprene seat covers
    2" leveling kit from Max Trac
    Diablo Trinity with Diablew Tune

  4. #4

    Default

    I hope its not so soothing that you fall asleep while driving. LOL.

  5. #5

    Default

    me? nah. The wife? out in 5.6 seconds once we hit the road! Reminds me of the E2-C Hawkeyes from the Carrier, great memories! I'll just sit there and Pretend I'm a P-38 Huntin down Prius'!

    2010 GMC Sierra 1500 SLE Extended Cab Z71 4X4 5.3L Flex Fuel
    MagnaFlow single in duel out system
    Volant CAI & Ram Air Scoop with Power Core Filter
    Rhino Tuff Grip Spray in Bed liner
    Undercover Classic Tonneau
    Trail FX Bug "deflector"
    AVS Window Deflectors
    Black Powder Coated Nerf Bars
    RECON L.E.D. Interior, 3rd Cab light, Projector headlights, and Taillights
    ATX Crawl Wheels wrapped in BFGoodrich Rugged Terrain tires
    CalTrend Neoprene seat covers
    2" leveling kit from Max Trac
    Diablo Trinity with Diablew Tune

  6. #6
    Jr. Mechanic drillbit26's Avatar
    Join Date
    May 2009
    Location
    Floyd, Virginia, United States
    Posts
    124

    Default

    well im still thinking about doing it without tuner but I just dont know
    2006 Silverado 2500HD, 6.0 Vortec, rhino spray in bed liner, LT package, westin step bars,true dual exhaust
    Mods to come: dixie horn, blacked out bowtie, recon smoked cab lights, recon led brake bar.
    Thank you lord:sign0011:

  7. #7
    Jr. Mechanic drillbit26's Avatar
    Join Date
    May 2009
    Location
    Floyd, Virginia, United States
    Posts
    124

    Default

    lets get some more opinions/ what did you do?
    2006 Silverado 2500HD, 6.0 Vortec, rhino spray in bed liner, LT package, westin step bars,true dual exhaust
    Mods to come: dixie horn, blacked out bowtie, recon smoked cab lights, recon led brake bar.
    Thank you lord:sign0011:

  8. #8

    Default

    Quote Originally Posted by Drake_korthos View Post
    me? nah. The wife? out in 5.6 seconds once we hit the road! Reminds me of the E2-C Hawkeyes from the Carrier, great memories! I'll just sit there and Pretend I'm a P-38 Huntin down Prius'!
    David
    2004 Silverado 2500 Crew Cab 4x4, AMSOIL EA air filter, Granatelli MAF sensor, Throttle body spacer, Magnaflow exhaust (true dual to 2 in 1 out muffler), 6" ProComp lift (add a leaf and 5" superlift rear block), Bilstein shocks, 35's (Cooper Disoverer ST) and 4.10 gears, Rhino Liner, EGRUSA fender Flares and widow visors, extended stainless steel brake lines, firestone airbags w/onboard air compressor, Pioneer Avic X940BT navigation, Accel backup camera.
    http://www.gmtruckclub.com/forum/sho...Silverado-2500
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

  9. #9
    Sr. Mechanic
    Join Date
    Mar 2010
    Location
    Auburn, Alabama
    Posts
    183
    Blog Entries
    1

    Default

    Ive got the 5.3 in an 07 new body with no muffler and I love the sound. It's not too bad in the city but on the highway youll get used to the sound of v4 mode. if you drive hard you wont even notice it!

    07 Silverado 1500 5.3L extended cab
    4" Rancho Suspension lift with Adjustable Shocks
    2" Leveling kit
    1.5" Zone Offroad body lift
    35x12.50 R 18 Nitto Trail Grapplers
    Ranch Hand Grille Guard
    Ranch Hand Rear Bumper
    Tow mirrors
    Color matched grey/silver Bushwacker fender flares
    Dual exhaust from cats back with X pipe coming out 5" tips
    Black Tool box
    Edge CTS Programmer
    Proliner Spray in bedliner
    20% tint all the way around

  10. #10
    Jr. Mechanic drillbit26's Avatar
    Join Date
    May 2009
    Location
    Floyd, Virginia, United States
    Posts
    124

    Default

    alabama I love your truck btw. So do you have true duals or is it split after cats and then straight pipes. if straight pipes does it throw any warning lights?
    2006 Silverado 2500HD, 6.0 Vortec, rhino spray in bed liner, LT package, westin step bars,true dual exhaust
    Mods to come: dixie horn, blacked out bowtie, recon smoked cab lights, recon led brake bar.
    Thank you lord:sign0011:

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