Why three stacks?

Discussion in 'Experienced Truckers' Advice' started by Mardet, Mar 18, 2012.

  1. Mr Ed

    Mr Ed Road Train Member

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    Must be for those new 9 cylinder engines.
     
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  3. SHC

    SHC Spoiled Rotten Brat O/O

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    CARB would care to differ on this lol
     
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  4. Gearjammin' Penguin

    Gearjammin' Penguin "Ride Fast-Truck Safe"

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    Much like the owner's brain. :biggrin_25526:
     
  5. skellr

    skellr Road Train Member

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    Truck is so bad it needs three stacks.
     
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  6. Truck Driver

    Truck Driver Medium Load Member

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    All the trucks I've seen with three stacks have been container haulers that run out of the ports in CA. Usually a truck that had stacks behind the doors. You can't enter the ports with a truck older than a certain year without a particulate filter, so a lot of those trucks have an aftermarket stack with a filter behind the sleeper and leave the old stacks on for looks. Its always a weird thing to see.
     
  7. Calve

    Calve Light Load Member

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    My uncle did this with his truck. Came time for him to replace the mufflers and exhaust on his truck, figured it was stupid money for the mufflers, replumbed his exhaust but couldn't take off the pipes due to holes in his body. So he just kept them on his truck. The back one is functional, the front two are just there.

     
  8. SHC

    SHC Spoiled Rotten Brat O/O

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    Replacement mufflers are $89 thru Truckpro or Ryder, so that makes it odd he spent more on plumbing a new exhaust??
     
  9. SHC

    SHC Spoiled Rotten Brat O/O

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    Good call. The one in the picture has a DPF stack (behind the cab) so that could be the reason why.
     
  10. Brandonpdx

    Brandonpdx Road Train Member

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    Yeah beat me to it. Looks like he was putting dual stacks on but didn't get it finished for whatever reason
     
  11. Rat

    Rat Road Train Member

    Sorry, we have alot of new paccar trucks in our fleet with stacks and they do not have a seperate weed burner exhaust on them. The stacks are fully functional.
     
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