304 Stainless exhaust build

Discussion in 'Full Custom Suspension / Cages / Fab' started by 1990sss10, Nov 8, 2018.

  1. 1990sss10

    1990sss10 Newbie

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    I recently built a 496 for my 2000 K2500. With the bigger engine, 11.3:1 compression, and mild cam I figured manifolds and crappy "Custom exhaust" wouldn't do. I ordered up a couple hundred bucks worth of 304 tubing and bends and got to work. The truck has Hooker long tubes, I sprung for the ceramic coating and the driver side has an O2 bung already.


    Out with the old
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    New stainless tubing and X-pipe, kept the Flowmasters and made a nice simple dual 3" setup.
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    I've got the exhaust mostly on the truck and I'll add some pics from underneath. The way the collectors dump and the truck being a 4x4 meant a lot of little angles and weird cuts to clear obstacles.

    You can see here the pipe from the driver side connects to the straight section with a v-band. The exhaust comes off easily and should never get rusted in place. I put the factory O2 towards the front of the passenger side pipe and the wideband O2 downstream a bit.
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    For you welding and fab guys I took some pics of the Vband clamp to show the use of Solar Flux instead of purging for welding stainless.
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    The solar flux works well. It does require some cleanup especially if there is anything down stream (turbo, O2 sensors, Etc). In my experience though it ends up costing a lot less than running extra gas through a purge setup.

    For those that don't know if you are welding V-bands there a few easy tricks to get them right.
    1. install the vband flange with the pipe slightly protruding past the flange approximately 1/8" or so. Offset the flange on the other side to have the pipe receed the same distance. This causes a plain vband to "interlock" if you bought the cheaper clamps without their own interlocking tabs.
    2. When welding, install the other side of the flange with the clamp to prevent warping. weld it up and let it cool before you remove the clamp.

    It might sound obvious, But I ruined a bunch of clamps and pipe learning those lessons.
     
    kennythewelder likes this.
  2. Beeffajitas

    Beeffajitas Newbie

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    That's exactly what I need. Really nice work!
     
  3. Christian Steffen

    Christian Steffen I'm Awesome

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    Oh man this is going to be nice. Just found your other build thread too. Engine in the truck yet?
     
  4. 454cid

    454cid I'm Awesome

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    Ha, those right angles! I don't think I've ever seen that before.

    I love the way the new exhaust looks!
     
    Rodney Saunders likes this.
  5. kennythewelder

    kennythewelder B31-3 (6-G) certified

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    Sweet,,,, nice write up.
     
  6. 1990sss10

    1990sss10 Newbie

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    Thanks guys. The engine is in and has fired up with the 0411 running it.
     
  7. Beeffajitas

    Beeffajitas Newbie

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    What program are you using?
     
  8. 1990sss10

    1990sss10 Newbie

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    Hptuners.
     
    Christian Steffen likes this.
  9. obxjake

    obxjake Newbie

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    Can anyone recommend a complete dual exhaust for 1994 K1500 Suburban 4x4...prefer Stainless Steel...I live at Cape Hatteras NC around salt water all the time even the air....just bought SS Headers Black Cat...also need Catalytic Converter, etc .....I'll have deal er install/Jake
     

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