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Old 09-16-2016, 02:19 PM   #1
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Join Date: Jul 2016
Location: BC-MT
Posts: 5
Year: 1983
Engine: 427 Chevy BB
Catalytic Converter!?!?! and exhaust questions

Howdy!

First- So I just had my rusted out muffler and exhaust conveniently fall off while I was running some errands saving me some work and reorganizing my priorities. So I am building a new super quiet exhaust system. it was dual 2.5" pipes that were Y'ed into a straight round 3.5in 3.5out 44x11 muffler with a 45 deg exit before the back driver-side wheels.

With my boxes in, figuring a new cheap walker muffler heavy duty or school bus muffler. I can either maintain the 3.5 in and out and go slightly smaller like the this or change to a 4" output on a school bus specific replacement.

I'm planning on running straight pipes all the way back as I have boxes basically everywhere I could put em on the side.

What's your ideal system. I want it to as quiet as possible as I will be city boondocking a fair amount of time and would like to be as courteous as possible

Second- it does not have catalytic converter. And probably never did based on how old the exhaust seemed. What is the legal requirement for old buses, mine is 1983 BB, it was a forest service bus, so I assume they were up to code. It's registered in MT so no worries about inspections, but I may want to import it into Canada eventually so just wondering if I should start saving my pennies
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Old 09-16-2016, 07:09 PM   #2
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Join Date: May 2016
Location: Richmond Virginia
Posts: 916
Year: 1984
Engine: 366 Big block Chevy! :) w/ Stick shift
427 big block me likey! lol

I don't have the answer but i am confident someone here will.
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Old 09-17-2016, 05:31 PM   #3
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Join Date: Jul 2016
Location: Prince George, BC, Canada
Posts: 491
Year: 1974
Coachwork: Bluebird
Chassis: CHEVROLET C60 just under 19700 lbs body#B10353
Engine: 350 ci on propane
Rated Cap: 48
Depending where you register and live in Canada will matter about inspections. Near Vancouver / Victoria you have to pass inspection.

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Old 09-17-2016, 07:18 PM   #4
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Join Date: May 2016
Location: Georgia
Posts: 922
Year: 2001
Coachwork: Blue Bird
Chassis: IH
Engine: T444E
Rated Cap: 14
If it didn't come with one, then I wouldn't bother adding one. It should be quite legal as it came from the factory.
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