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Exhaust for tbi

Discussion in 'TBI & EFI Conversions' started by NCTyphoonKid, May 31, 2019.

  1. NCTyphoonKid

    NCTyphoonKid Full Access Member

    Posts:
    1,174
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    Joined:
    Jun 18, 2011
    Location:
    Trinity,NC
    First Name:
    Korey
    Truck Year:
    1987
    Truck Model:
    Silverado R10
    Engine Size:
    5.7
    looking for some exhaust ideas for my 87 long bed exhaust system. Anyone update the manifolds and exhaust system on a tbi? Not looking for anything crazy but I’m tired of the exhaust leaks on my rusty original system
     
  2. Preston

    Preston Full Access Member

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    Joined:
    Jan 25, 2019
    Location:
    Mechanicsville VA
    First Name:
    Preston
    Truck Year:
    1983,1984,1985
    Truck Model:
    83 c3500 (3) 84 K10’s 85 silverado 68 c10 short bed stepside
    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    I just installed headers on my 85 with new mufflers sounds great, got rid of all the exhaust leaks I’m still running a carburetor (replaced rogerchester with an edlebrock) eliminated a lot of vacuum leaks too. I really like the new sound went with megaflow rumble welded mufflers. I kept the pipes the same size as the collectors all the way back. So much for me good luck with your project.
     
  3. NCTyphoonKid

    NCTyphoonKid Full Access Member

    Posts:
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    Joined:
    Jun 18, 2011
    Location:
    Trinity,NC
    First Name:
    Korey
    Truck Year:
    1987
    Truck Model:
    Silverado R10
    Engine Size:
    5.7
    Did you buy a exhaust kit or have a shop custom make one? I’d like to install it myself but don’t have access to tube bender ms and all that fun stuff
     
  4. Preston

    Preston Full Access Member

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    Joined:
    Jan 25, 2019
    Location:
    Mechanicsville VA
    First Name:
    Preston
    Truck Year:
    1983,1984,1985
    Truck Model:
    83 c3500 (3) 84 K10’s 85 silverado 68 c10 short bed stepside
    Engine Size:
    454 in 85 dually 5.7 LS in 84 350 in 85
    I used header extensions from headman out of the box came with the gaskets and hardware to connect to headers, drivers side a snap passenger side was tight removed the brace that was inside the frame rail. Bought the rumble welded mufflers and 4’ of straight pipe all from summit worked great sounds awesome

    9D8FCDC4-DD04-4CA9-A29C-3DC6B5346F67.jpeg

    2D8EE7F2-6729-4B1F-B735-8953C57AAD6F.jpeg
     
    bucket and 78C10BigTen like this.
  5. 89squareburb

    89squareburb Junior Member

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    Joined:
    May 31, 2019
    Location:
    Burrton KS
    First Name:
    Billy
    Truck Year:
    1989
    Truck Model:
    R1500 Silverado Suburban
    Engine Size:
    5.7L
    89 R1500 350 TBI, stock manifolds, y pipe to full 3" mandrel bent pipe with catn delete, flowmaster delta flow 50 series, 90 out in oe location with 4" tip. Adding 3 wire O2 sensor, and Stainless steel shorty headers next. Flows great, sounds mellow at idle, and barks under load, or high rpm. Built my system here at the shop I work at. Any reputable exhaust shop should be able to duplicate easily.
     
  6. kickdeez

    kickdeez Full Access Member

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    Joined:
    May 23, 2014
    Location:
    north carolina
    First Name:
    kyle
    Truck Year:
    1990
    Truck Model:
    Suburban 2500
    Engine Size:
    454 tbi
    Mine's a 454 TBI. I just replaced my old cracked and leaking factory manifolds with new replacement manifolds. I have the factory y-pipe with a simulated catalytic converter (because no emissions testing on pre-96 vehicles in NC) and a flowmaster RV style muffler. She idles nice and low, and when you get on it, she'll let you know.
     
  7. Catbox

    Catbox Full Access Member

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    Joined:
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    Location:
    Portland Oregon
    First Name:
    Peter
    Truck Year:
    1979
    Truck Model:
    C20 Silverado Camper Special
    Engine Size:
    461
    I see this is an old thread, but what the hay....

    My 1995 Suburban still has the stock manifolds and Y pipe.
    I have replaced the cat with a high flow one many years ago.
    For the muffler I had a Flowmaster 40 series muffler put in to the stock location with the proper pipe extension to connect to the tail pipe.

    Sounds good and was fairly easy to make happen.
     
    85squaredC10 likes this.

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