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Flowmaster 40 Blow Out

Discussion in 'Chevy Trucks' started by Moss Man, Nov 27, 2011.

  1. Moss Man

    Moss Man Senior Member
    from Maine
    Messages: 535

    I have a dual inlet single outlet Flowmaster 40 2.5" on my 6.0 Liter 05 Chevy and the whole outlet side let go the other day while plowing. I like the Flowmaster 40, but it talks a little too much when I'm hauling the dump trailer full of green firewood. Question is; what can I replace it with that performs as good but would be a tad quieter? I don't want real quiet, but something with a decent rumble to it. The Flowmaster 50 could be OK I suppose. The pipe from the muffler back probably needs replacing too, it is a 3.5" and seemed to be working well. Single exhaust from the muffler back, I prefer it.
     
    Last edited: Nov 27, 2011
  2. matzke3

    matzke3 Member
    Messages: 50

    I had flowmaster 50's put onto my service truck since the place that bent the pipes forgot to order 40s and could get 50s next day. I really like the turnout. Its got good tone and is just a hair quieter than the 40s. The mufflers themselves are pretty massive. My service truck is an 87 chev tbi 350. dual 2.5 exhaust 4x24" tips if it helps.
     
  3. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    swaping from 40 to 50 is a lot better in the cab of the truck. lot less harmonic noise.

    also there is std 50 / 50 delta flow / 50 suv in that order thay get less noise from each other.

    i use to run 2 3" in/out 40 delta flows on my old crewcab then when thay rusted out ( thanks salt ) i found a deal on a 50 suv 2x inlet and 2x outlet direct for the truck. WOW what a huge diffrence inside the truck wished i had done that years ago.

    best part is the outside noise is real close to the 40 so you will still get what you are use to out the tail pipe.

    and if your not in a hurry watch ebay for deals on mufflers. last 3 i got were new old stock or run for 10-20 miles and taken off as thay didnt like the noise level. and each one with shipping i paid less than 1/2 new.
     
  4. Moss Man

    Moss Man Senior Member
    from Maine
    Messages: 535

    I'll start looking for used ones on craigslist and Ebay, great idea. The old one is getting me by, It's just loud in the cab with no tailpipe.
     
  5. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

    ya my plow truck i ran no tail pipe for years . the 40 i had on it finaly rusted out. so i put a 50 on and little better. but then for the heck of it i tryd a tail pipe also and WOW what a huge diffrence in the cab on sound levels. no more echoing under the steel flatbed deck.
     
  6. Dissociative

    Dissociative 2000 Club Member
    Messages: 2,066

    Makes me love my 4" open pipe of the 6.0 turbo all that much more....it ROARS!

    are you the same mossman with droopy the plowtruck?
     
  7. Moss Man

    Moss Man Senior Member
    from Maine
    Messages: 535

    I hope not, I don't want to associate with anything named droopy..................:eek:
     
  8. Moss Man

    Moss Man Senior Member
    from Maine
    Messages: 535

    The 2 pipes on my truck that enter the muffler measure 3.069" on the outside diameter, I am assuming those are 3" pipes from the factory as the exhaust is original. So, this means I can run a muffler with 2 3" inlets and one 4" outlet if they make such an animal?

    The set up that blew off was 2.5" inlets and the previous owner stuck those inside the exhaust pipes and welded them in. On the outlest side it appeared to be the muffler had a 3" exit and then they had it expanded out to 3.5" a little ways down the pipe to the end.

    I found this one at the Flowmaster site, a bit pricey but they are probably cheaper than that in the real world;

    http://www.flowmastermufflers.com/s...ucts_id=3339&ab=530513&recordID=&vehicle=2004 CHEVROLET SILVERADO 2500 HD V8&orig=530513
     
    Last edited: Nov 28, 2011
  9. sweetk30

    sweetk30 PlowSite.com Addict
    Messages: 1,588

  10. GMCHD plower

    GMCHD plower PlowSite.com Addict
    Messages: 1,819

    Off topic, but what do you have for a dump trailer Moss?
     
  11. Moss Man

    Moss Man Senior Member
    from Maine
    Messages: 535

    It's a PJ Trailer 7'x14' 14000 lb scissor lift, I got it for the sweet financing deal they have going. It hauls really nice, I've tried a couple others and they were pale in comparison. PM me if you have any questions. My buddy has a SureTrac equipment trailer, they make a real nice dump trailer too and I think I would consider them if I had it to do over.

    http://www.pjtrailers.com/detail.cfm?ID=D7

    [​IMG]
     
    Last edited: Nov 28, 2011
  12. Dissociative

    Dissociative 2000 Club Member
    Messages: 2,066

    I'm not by my pc but ill put the link in the am......theres a guy with a badazz cummins swap OBS ford on another forum thread with very similar name....

    It's a good read if ya like OBS fords a lot.
     
  13. larboc

    larboc Member
    Messages: 86

    Turbo gas gm 6.0? or P.(O).S.?
    Details if you turbo'd your gas 6.0.
    Pity if you own a 6.0 powerstroke.
     
  14. 70monte

    70monte Senior Member
    Messages: 468

    That is the same part # I put on my 98 K3500 with the 7.4L last week except mine has a 116 number after the main part number and my outlet comes out the middle of the muffler instead of offset. It has a nice tone to it but not too loud inside the truck.

    Wayne
     
  15. chitown sparky

    chitown sparky Senior Member
    Messages: 153

    I just got a dynamax VT put on and I love it it is not loud until you jump on it and going down the highway it is just like stock I have a 2007 chevy 2500 with 6.0 liter. It has a flap inside and the flap opens all the way when you jump on it hope that helps
     
  16. chitown sparky

    chitown sparky Senior Member
    Messages: 153

    forgot to add the noise in the cab is just like stock
     
  17. Moss Man

    Moss Man Senior Member
    from Maine
    Messages: 535

    I got the Flowmaster Big Block 50 muffler installed today. The inlets slid right over the 3" OEM pipes on the truck and clamped up fine, nice fit. The outlet came with a 3.5" adapter pipe for some reason and that slid right over what I had left for a tailpipe after trimming the rusted section out. I thought for sure I'd be having a custom 3.5" tailpipe bent up for this application. For and aftermarket pipe and a previously hacked exhaust, this job went better than we could have ever hoped. The sound is just about where I wanted to be, not too loud in the cab, but a healthy roar out the back under throttle. I'm satisfied. The muffler was a little spendy($180.), but worth it. I could of got it online cheaper, but the local parts boys had it overnight for me.
     
    Last edited: Dec 13, 2011