Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

Replacing mufflers with flex pipe. Yes or no ?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by seabring, Nov 15, 2012.

Page 1 of 3
  1. Nov 15, 2012 #1
    seabring

    seabring Road Train Member

    1,844
    1,882
    Apr 24, 2011
    0
    If I was to remove the mufflers and run flex pipe in their place would this be ok? I have standard 5 inch pipes and don't want it loud but want free up the flow. It's my budget way of doing it before paying for free flow mufflers . Any ideas ? Yes / No?
     
    seabring, Nov 15, 2012
    seabring, Nov 15, 2012
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Nov 15, 2012 #2
    belltransit

    belltransit Light Load Member

    271
    27
    Jun 28, 2010
    oak grove, mo
    0
    yea u can...but its goin to be loud.
     
    belltransit, Nov 15, 2012
    belltransit, Nov 15, 2012
    #2
    kw9's rock and RedPete95 Thank this.
  4. Nov 15, 2012 #3
    bender

    bender Road Train Member

    2,105
    1,352
    Jul 20, 2010
    Don't Kid Yourself
    0
    You can buy ten foot lengths of five inch aluminized pipe cheaper than good flex pipe would cost. Walker, Stemco and other exhaust suppliers have it in their catalogs.
     
    bender, Nov 15, 2012
    bender, Nov 15, 2012
    #3
    kw9's rock Thanks this.
  5. Nov 15, 2012 #4
    Oscar the KW

    Oscar the KW Going Tarpless

    12,246
    28,114
    May 19, 2011
    0
    An acert is not very loud at all when straight piped. But I wouldn't use flex pipe all bent around in place of the mufflers. In the Kenworth forum I posted some pics of how I did mine. Didn't use anything other than what was already there and maybe a foot of flex pipe to join up everything to make it work. You will need a welder to weld the down/y-pipe back together. It will need to be shortened about four inches. I never noticed mine was straight piped until I put the BD tuner on it, now it has a drone/resonance that is annoying and I am trying to figure out how to eliminate that without causing a restriction.
     
    Oscar the KW, Nov 15, 2012
    Oscar the KW, Nov 15, 2012
    #4
    kw9's rock Thanks this.
  7. Nov 15, 2012 #5
    bender

    bender Road Train Member

    2,105
    1,352
    Jul 20, 2010
    Don't Kid Yourself
    0
    Forgot about your muffler style and location. Tight radius elbows are available to piece together in place of the muffler.
     
    bender, Nov 15, 2012
    bender, Nov 15, 2012
    #5
    kw9's rock Thanks this.
  8. Nov 15, 2012 #6
    Superhauler

    Superhauler TEACHER OF MEN

    12,209
    100,727
    Jan 30, 2010
    keep stroking.
    0
    a good welder can weld your pipe's together. i took 2 90deg. elbows and made a 180deg with a donaldson muffler underneath my w900L works great. and cheaper than PP's under cab setup.
     
    Superhauler, Nov 15, 2012
    Superhauler, Nov 15, 2012
    #6
    kw9's rock Thanks this.
  9. Nov 15, 2012 #7
    seabring

    seabring Road Train Member

    1,844
    1,882
    Apr 24, 2011
    0
    Thanks for the responses guys. I will look into what I can do next time I am home. One place I called in Winnipeg said they will sell me mufflers that they will cut the baffling out of first but don't know if I want to pay for something then have it cut up. Will try to get some pipe and do it cheaply. I picked up 0.5 mpg after putting new air filters on the canisters so would hope to get a bit more improvement on the mpg if I can eeliminate the mufflers as well. Just don't want it too loud , don't want to be attracting the wrong attention without the mufflers .
     
    seabring, Nov 15, 2012
    seabring, Nov 15, 2012
    #7
  10. Nov 16, 2012 #8
    heavyhaulerss

    heavyhaulerss Road Train Member

    3,723
    2,040
    Dec 23, 2009
    AL/TN BORDER
    0
    does the law require trucks to have mufflers? would the d.o.t. fine you or shut you down if you do not have one ?
     
    heavyhaulerss, Nov 16, 2012
    heavyhaulerss, Nov 16, 2012
    #8
  11. Nov 16, 2012 #9
    Oscar the KW

    Oscar the KW Going Tarpless

    12,246
    28,114
    May 19, 2011
    0
    I have heard that Colorado will write tickets for no mufflers.
     
    Oscar the KW, Nov 16, 2012
    Oscar the KW, Nov 16, 2012
    #9
  12. Nov 16, 2012 #10
    Oscar the KW

    Oscar the KW Going Tarpless

    12,246
    28,114
    May 19, 2011
    0
    Do you have any drone or exhaust resonance with your setup?
     
    Oscar the KW, Nov 16, 2012
    Oscar the KW, Nov 16, 2012
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

    • Page 1 of 3