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 8 of 8
  1. #1

    Default DIY muffler install w. clamps

    How hard is it to install a aftermarket muffler using clamps? I know that my pipes are 3" inlet and outlet, so I need to get a muffler that is 3" in and out.

    I'm going to use clamps and extra tubing from autozone. What size do the clamps need to be?
    2000 Silverado 5.3L Z71 4x4: K&N air filter, Procomp 16x8 rims, 285/70R16 Toyo AT2s, Kenwood head unit, Alpine 500.1 amp, 12" kicker, Infinity 5.25" speakers, Bilstein HD shocks, EBC GD Sport dimple & slotted front rotors w. EBC green stuff pads, Brembo slotted rear rotors & HIDs.

  2. #2


    Getting ready to attempt the same project myself. I called and ordered the Magnaflow XL, 3" center in/out. I told them I wanted band-style clamps, as a member on this board suggested I get that kind. I was told there are two kinds, a lap and butt. Not only did the sales rep know which kind I should get, he knew the size too, and even explained how it was to be put together with the pipe. He was very helpful. You may want to call them. Just a suggestion from a total newbie.
    My rig: 1993 Suburban K2500 & 16ft stock trailer.

  3. #3


    when I worked on cars back in 60's & 70's exhuast systems where clamped togeather from the factory it was easier for back yard mechanics to work on them.
    Mike :glasses:

    2002 Silverado 2500HD 6.0 4:10 gears

  4. #4


    This should be a simple process. I'll have to slide under my truck first to see what I have to work with.

  5. #5


    Go to the mufflers manufactures website and they should list a direct replacement muffler so no pipe extension would be needed. A few days before the swap, soak the stock muffler and clamps with a rust desolver (WD 40, Blaster etc.)

  6. #6


    So I'm picking up a used Flowmaster original 40 series muffler. It's 2.5" in/out and one of the louder mufflers. I want something quieter but I'm going to put this bad boy on anyways.

    My question is: How can I make the muffler quieter? Should I run all 2.5" tubing? Or can I stick something in the muffler to shut it up a lil?

    Also, I believe my stock tubing is 3" so by downsizing the tube size, it should quiet the muffler down? Right?

  7. #7
    Jr. Engineer hundojoe's Avatar
    Join Date
    Feb 2010
    Elk River, Minnesota


    Install some new muffler bearings and that should take care of the noise.
    1999 Silverado Regular Cab Short Box
    Black on Black, Line-X sprayed in bed liner
    5.3 with K&N CAI, Texas Speed 220/220 cam with 112 deg LSA
    Texas Speed computer Tune
    American Racing Headers with Cats
    4.11 gears front and back, with Eaton rear posi
    Flowmaster 40series true duals
    16X8 American Racing Nitros with 305/70/16 Goodyear MTR's
    285's in the pic

    If it ain't broke...........Give me a minute!

    Im not completely useless, I can be used as a bad example...

  8. #8


    Too much turkey caused some laziness, thus, I ended up at the local muffler shop. $40 to install my ****. It's decent. not too loud but noticable. Highway criusing isn't bad depending upon my right foot.

Similar Threads

  1. I need help on my flowmaster muffler install
    By SRALinQ in forum General Chevy & GM Tech Questions
    Replies: 9
    Last: 09-25-2009, 12:39 AM
  2. New Muffler
    By Tapper1823 in forum Performance & Fuel
    Replies: 12
    Last: 08-10-2009, 01:40 AM
  3. Which muffler?
    By randyc1959 in forum Chevy Truck Accessories
    Replies: 28
    Last: 07-06-2009, 04:00 PM
  4. which muffler??
    By Jordan in forum Performance & Fuel
    Replies: 9
    Last: 09-03-2008, 10:35 PM
  5. New muffler
    By Mmarrocco in forum Performance & Fuel
    Replies: 3
    Last: 06-20-2008, 08:01 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