Recommended Exhaust for Vortec 454??

Discussion in 'Exhaust' started by udownwitkj, Dec 3, 2016.

  1. udownwitkj

    udownwitkj Newbie

    Messages:
    7
    Likes Received:
    1
    Joined:
    Dec 3, 2016
    Location:
    Athens GA
    Just picked up a 1997 Suburban 2500. I will be using it to tow a trailer full of ATV's and also my two b-bodies to out of town shows, one at a time of course. Like most people, i like to mod my vehicles. Im looking for opinions on an exhaust setup. one muffler, dual mufflers, 3 or 3.5" pipe, X-pipe... Im just getting into the research phase and have not seen much so far. Will modding exhaust help or hurt fuel economy? doesn't matter but if it helped, that would be a plus.

    20161130_163509_zpskxhuxhxs.jpg

    20161130_111501_zps345hrmk2.jpg
     
    Jorge6.5 likes this.
  2. RatPwrd72

    RatPwrd72 Newbie

    Messages:
    30
    Likes Received:
    31
    Joined:
    Oct 20, 2016
    Location:
    Maysville, OK
    Following along to see what everyone recommends. I've got a 96 dually with the stock exhaust on it and need to do the same. Not looking for loud at all, just a little more than stock and maybe some power improvements. I've looked at the Gibson cat back with mixed reviews.
     
  3. 4L80

    4L80 Newbie

    Messages:
    12
    Likes Received:
    1
    Joined:
    Dec 14, 2016
    Location:
    0ntario
    I put the Gibson catback single pipe on my 93 K2500 reg cab 5.7 about 4 years ago. Nice gentle rumble, easy install, but at the time, I believe they were made for a K1500, so I had to get the muffler shop to put a little extra bend in a short piece of midpipe. Another positive is it's all stainless so hopefully it never has to be done again from the cat back.
     
  4. mutanay

    mutanay OBS Enthusiast

    Messages:
    65
    Likes Received:
    25
    Joined:
    Dec 13, 2016
    Location:
    Orange, CA
    Before i went to straight pipes, i had a Flowmaster 40 dual muffler. It had one of the nicest tones for the ear. It is not obnoxiously loud like straight pipes and it is a trusted brand in my opinion. If you want the nicest tone get a flowmaster
     
  5. michael hurd

    michael hurd Stalker be gone.

    Messages:
    1,876
    Likes Received:
    525
    Joined:
    Jul 30, 2012
    With an 80% VE, 454 cubic inches, and a power peak at 5000 RPM, you would require a combined flow of about 525 CFM through your exhaust. You can use a single muffler if it exceeds that flow requirement, or if duals, combined 525+CFM if you want low restriction.

    Single 2 3/4 to 3" would be sufficient, or dual 2 1/2" would flow more than a single 2 3/4 or 3".
     
  6. Mike Napolitano

    Mike Napolitano Newbie

    Messages:
    10
    Likes Received:
    0
    Joined:
    Jul 6, 2017
    Location:
    Mahopac ny
    Hi there I see you and others on here are looking for exhaust system for k2500 suburban with a 7.4L in it. I did an extensive search and found a place on line called parts geek which carries the stock muffler for $91.00 and will be buying it for my father's 1998 Chevy suburban k2500 7.4L . Once I get it I will let you know how it fits. But try parts geek they have a selection of factory style exhaust systems. I hope this was helpful to everyone as I myself have scouward the internet for the last week to get this far.
     
  7. Jorge6.5

    Jorge6.5 I'm Awesome

    Messages:
    1,013
    Likes Received:
    149
    Joined:
    May 17, 2013
    Location:
    Schoharie, NY
    Stock exhaust is a joke. Do dual 2.5" after the Factory down pipes, go into a single straight through muffler,
    Preferably with an internal crossover, to dual 2.5" tail pipes. Out the back or behind the tires.
     
    Christian Steffen likes this.
  8. phat69

    phat69 Newbie

    Messages:
    18
    Likes Received:
    2
    Joined:
    Jul 20, 2017
    Location:
    TX
    You won't see much with the factory manifolds.
     
  9. karl02

    karl02 Newbie

    Messages:
    26
    Likes Received:
    0
    Joined:
    Jun 4, 2013
    I also have a Gibson catback that I got from 4wheelonline. It has a deep sound that is slightly loud.
     

Share This Page