GM Truck Club
Founded in 2004 ~ We're the #1 Chevy Truck & SUV Forum.
Silverado & Sierra | Tahoe & Yukon | Suburban & Yukon XL | SUV & CROSSOVER
Results 1 to 5 of 5

Thread: Muffler size

  1. #1
    Jr. Apprentice
    Join Date
    Jun 2007
    Portage la Prairie, Manitoba, Canada

    Default Muffler size


    I searched but with no results. I am changing just the muffler in my 09 silverado 5.3 and am looking for the correct size muffler needed with the stock piping. Is it 2.5" or 3".

    THanks in advance!!

    2009 Chevy Silverado Ext. Cab w/ Z71 Plus (4x4)

  2. #2
    Master Mechanic CarpenterGuy's Avatar
    Join Date
    Jul 2008
    Leeds, Alabama


    i'm pretty sure its 2.5 but i could be wrong
    2006 Silverado Z71 - 97,000 - totaled, RIP
    2006 Silverado Z71 - 122,000 (K&N 77 Series CAI, PowerAid TBS, Magnaflow dual rear exit, 33x12.50 Mickey Thompson MTZ, Tuff Country Torsion Keys, Tuff Country Add-A-Leafs)
    1966 C10 swb stepside (Gen I 350, Turbo 400 trans, dual cyl power brakes, front discs)
    I'll keep my money, guns, and freedom. You keep the Change.

  3. #3
    Legend 2ToNe04's Avatar
    Join Date
    Apr 2009
    Fresno California
    Blog Entries


    Quote Originally Posted by CarpenterGuy View Post
    i'm pretty sure its 2.5 but i could be wrong
    thats what always thought, because on our models they are 2.5, but maybe its a 3 on the new truck im not sure.

    2004 4.8| Custom Paint| Tint| De-badged| Shaved Tailgate| Rollpan| Smoked Tails| Color Matched| Lowered 5/8| Suede Interior| Color Matched Interior| Indash & TVs| Mids-Lows & 2 12" CVRs| 500 & 1100 Interfires| Soundeadener| Outlaw CAI| Magnaflow|
    Future Mods: 6.0 LQ4/9| Bags|

  4. #4
    Jr. Engineer
    Join Date
    Aug 2009
    Muddy Creek, Va & Hunting Quarters NC


    um you better measure it to be sure

  5. #5


    take a tape measure and measure the diameter, it should be 2.5 or 3 inches. If for some reason you can't do that measure around the pipe, if it is about 9.5 inches around its 3 inches and if it is almost 8 inches around it is the 2.5 inch.
    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.
    1960 Land Rover Series II 88
    2001 Pontiac Sunfire
    2013 Toyota Avalon Limited (Wife's Car)
    NRA Life Member

Similar Threads

  1. What muffler do you run?
    By lancer in forum Performance & Fuel
    Replies: 11
    Last: 11-16-2009, 07:21 PM
  2. best muffler for 6.0L
    By drumm14 in forum Performance & Fuel
    Replies: 8
    Last: 06-17-2009, 07:55 PM
  3. which muffler?
    By 5speedsilverado in forum Performance & Fuel
    Replies: 6
    Last: 06-03-2009, 10:28 PM
  4. New muffler
    By Mmarrocco in forum Performance & Fuel
    Replies: 3
    Last: 06-20-2008, 08:01 PM
  5. Should i cut my muffler off or not?
    By paulyboy in forum Performance & Fuel
    Replies: 8
    Last: 06-11-2008, 06:09 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts