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'83 Exhaust Legal Loop Holes----FOUND! (Kinda)

Discussion in '1973-1991 K5 | Suburban | Truck' started by Blazer_Boy, Jul 20, 2002.

  1. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    \'83 Exhaust Legal Loop Holes----FOUND! (Kinda)

    What year did it become mandatory to HAVE to run the single pipe and one cat setup on trucks. Every exhaust shop in town is telling me I have to do that way before I can even get out what year it is to them. I have a cheeseball homemade dual setup at the moment with brand dynomax super turbos. It would be really nice to able to use those mufflers on nice pipes instead of having to be out the money for those mufflers. Not to mention how much easier transmission work is without a stupid crossover right in the way. I have some wierdo stainless steel tubular manifolds that GM used for a very short time on heavy duty applications. So the dynomax tubing kit wouldn't work. Heck I'd be even happy with true duals with a cat on each pipe. I always get the routine that it is HAS to be a single pipe. Does anyone know what the laws are on this and what options I'd have.
     
  2. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: \'83 Exhaust Legal Loop Holes

    If you don't have emissions tests, just ignore them and find someone to build you custom exhaust.

    Did you try the Dynomax manifold dual kit with those tubular manifolds or the header dual kit?

    If all else fails, tell them it's a '75 with a new front clip.
     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    It's been in the last few years. Basically, (unless you go with a newer engine) you can not alter the number of catalytic converters on the vehicle. *Thats* what kills everything. There is no "off-road use only" exemption anymore.

    Since you've got those "headers" (those are sweet BTW) I can see where your problem stems from. I know its the same way around here, no one will touch my exhaust, unless you have friends in the right places : )

    Stock diesel stuff bolts right up if you had the *standard* exhaust, but I'm curious now if anyone sells diesel exhaust kits? Thats a fairly decent loophole, as long as you are the one doing the installing.
     
  4. reddog64

    reddog64 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    me thinks it was mid 78...

    the guy's that did me 78 k5 asked if it originally had duals no cats, he said something about a cut off year
     
  5. jimmyjack

    jimmyjack 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    I was told noone in Tucson would replace my single with a dual exhaust. Until one sunshiny day a guy told me "unless the Y is damaged". (where the two pipes turn to one) Ask about that. See what happens. Good Luck. I never did it. I bought a parts blazer that had dual exhaust and put it on mine /forums/images/icons/grin.gif
     
  6. 84_Chevy_K10

    84_Chevy_K10 Banned

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    Re: \'83 Exhaust Legal Loop Holes

    400 SBC trucks had dual exhaust as far as I know.

    I would like to see anyone show me a ticket that someone was written for not having a cat in a state without emissions tests. I've never seen one--only loud exhaust tickets.
     
  7. Batmanjr

    Batmanjr 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    My 83 Diesel came with stock true duel, and a muffler shop here will run anything you want as long as you say it's for off-road purpose only! That's the way I get my exhaust done! I still have the factory 83 setup and my wife's 87 has true dual 3" with nothing but flowmasters(NO CATS!) That was installed by the muffler shop for $200! Had to pay cash if you know what I mean! /forums/images/icons/cool.gif
     
  8. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    I may be able to BS my way into saying its a full vortec motor. I only have the Vortec heads and almost stock idle. Hmm, I could buy the Dynomax pipe kit and see what I can pull off. One pipe may bolt up, but not the passenger's side. It doesn't have the straight down drop, but comes out at 45 degrees like the drivers. One side also comes down further than the others. I should have got headers /forums/images/icons/tongue.gif On the other hand though these manifolds don't crack, rust, or got extremely hot.
     
  9. white-rhyno

    white-rhyno 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    Man, I work at an exhaust shop and we will do just about anything to any rig. But then again, we dont have to worry about emmision laws.
     
  10. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    As long as the motor was certified for dual exhaust (thinking Camaro's of a couple of years...center bolt valve covers would have been the norm then) and has all the emissions stuff on it from that vehicle, then you are set. Of course, most shops won't take the time to figure out if its all correct, but if you are carbed, its not going to be too tough. Don't think the carbed Camaro's ever got duals with two cats : (

    However, *they* shouldn't have to research this stuff that deep, not sure how the law would look on it, but if they are doing what they *think* is right, I would hope that the law would back them up if they got reported.
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    You don't have to worry until someone reports your shop. Its federal regulation, if you violate it, the feds come after you (or can) not the locals. Hopefully you aren't giving receipts, for if someone happens over from Spokane or Seattle, goes to an emissions testing place, and somehow rats your shop out, (like they fail and happen to mention duals with no cats, and has the receipt) it would take no time whatsoever for the state to call the EPA and report your shop. I think the fine for shops is the same as individuals, $10,000.

    I don't know personally anyone that has a shop that was fined for illegally modifying exhaust, but it must happen, or it wouldn't be this hard to get done. (come over on this side of the mountains and ask around to have this job done) I know the EPA exists in Seattle, I actually called them when I found out my truck with '74 drivetrain was going to be titled an '81 by the state, and have to meet '81 emissions standards. Of course, they were no help whatsoever, and basically said "the state is gonna shaft you, and we have no intention of helping you out"

    I have a feeling, when all is said and done, urban areas with emissions testing are the places that shops are fined, and not rural non-emissions tested locations. Probably enough to do for whoever checks shops in the heavily populated areas to bother you guys.

    Heck, may have to trailer my car to your shop when hunting season starts! : )

    I'm not trying to scare you or the shop, just hoping that everyone is careful so that nothing happens to you or your place of employment. I'm ticked that its so hard to get the exhaust work done on my car that I need!
     
  12. ntaj*ep

    ntaj*ep 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    HOLY SH!T!!!!! Someone better tell ALL the '95-'03 Chev., Ford, Dodge, Jeep, Honda, Acura, Land Rover.........owners They are breaking the law!!! Not to metion all the manufactures of "bolt on dual systems", Flowmaster, Gibson, ect. As far as Emissions law goes If you have a cat. you can't remove it, well you can but a shop can't. You can put 5 cats. in if you'd like, but you need at least one. The problem on '95 and up vehicles is that there is more the ECU needs to monitor, which means there is an oxyegn sensor before and after the cat. So if you have one cat. now you don't have enough O2s to go around. I don't see why a shop or shops don't want your money.
     
  13. Cmoe

    Cmoe 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    Mine is a '78 Blazer that came with a 400 small block. came from the factory with dual exhaust and no cats. Call up a shop and see what they say if you have a '78 w/ a 400 and you want to go back to dual exhaust? Worth a try.....
     
  14. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    I think you are talking about "cat back" systems, which the EPA doesn't apparently care about.

    You can't alter the number of catalytic converters + or - what the vehicle had from the factory. (unless you switch the engine/emissions from some vehicle set up that way stock)

    Even if you want to put a converter on a '55 Chevy, its illegal.

    O2 sensors weren't widely used on GM vehicles before '81, if at all, but cat converters were standard since 1975, excepting some trucks of course. The newer after-cat O2's make it more difficult to modify the exhaust, but thats not the reason you can't add or subtract converters from a vehicle.
     
  15. BigBluOx

    BigBluOx 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    When I can afford it, it sounds like I'll be getting my exhaust done in Ellensburg /forums/images/icons/grin.gif . I already have dual, and no cats, but the itty-bitty pipe is... well, itty-bitty. I think it needs 3" pipe /forums/images/icons/cool.gif I think I'll do more research into diesel emissions in Wa...

    Jon
     
  16. ntaj*ep

    ntaj*ep 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    Well your in Iowa, so what you need to do is call your local EPA station and ask them what is specifically legal to do in your county.

    You won't get anything but opinion and hearsay from the board. As we are not in your area and can't accuratly tell you what is and is not legal in your area. The laws for what you perpose are forever changing, so just because you can't do what you'd like today does not mean you can't do it tomorrow. Good luck with it and don't let opinion scare you, get the facts. /forums/images/icons/smirk.gif
     
  17. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    I went through the opposite here trying to convert a car to gas from diesel. Have to (according to the state) change the fuel gauge, tank, exhaust, sticker on the fuel fill door, use an engine as new or newer than the model year of the vehicle, then have it re-certified (by the state of course) so the title can be changed to reflect gas, and have the proper year noted for emissions. I scrapped the car instead lol.
     
  18. kennyw

    kennyw N9PHW Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    Just get in your rig and drive down the smallest 2 lane highway you can find till you run into a small welding/muffler shop ran by one guy that doesnt take credit cards... He should be able to take your cash /forums/images/icons/wink.gif

    If you were to convert a car from diesel to gas why bother telling the state to get it on the title? the emissions laws are better for a diesel and a gas motor would pass them with flying colors I would think.
     
  19. dyeager535

    dyeager535 1 ton status Premium Member

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    Re: \'83 Exhaust Legal Loop Holes

    They meausure sulfur on the diesel sniffer test AFAIK. Yes, we have diesel emissions testing here, (but no visual at least) so you could certainly try that, but I have a feeling what a diesel puts out for emissions is significantly different than a gas motor, and the inspector can fail you if they *think* there is an emissions problem, such as a hole in your exhaust pipe ; )

    I would imagine having a diesel not *sound* like a diesel would be grounds for failure of the test, and it just wasn't a fight I wanted to get in, especially if I swapped everything over then they told me I did something wrong and it would never get titled, which I wouldn't put past this state.
     
  20. Blazer_Boy

    Blazer_Boy 1/2 ton status

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    Re: \'83 Exhaust Legal Loop Holes

    Where there is a will, there is a way. I got my duals done. I heard from some old timer my uncle knows that there was a small service station about 60 miles away that would do duals. I rolled into town, and its only over a thousand or so for population. This little shop had a full tubing bender and over half a dozen service trucks and tanker semis. I got full aluminazed 2.25" pipe from the shorty headers all the way to behind the tires for only $150. All I did was provide the mufflers. That meant my whole system was $230. In Sioux City, an emissions exhaust job would run $450+. The only way someone is going to get the name of the shop out of me is if they are in the same sitaution. They were extremely nice and would hate to see them get in trouble. Those little towns seem so much nicer than the big ones.
     

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