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Old 08-03-2017, 01:24 PM   #1
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Need replacement mufflers and pipes

Does anyone know of a good national parts outlet for the best prices on RV exhaust parts?

I am replacing both mufflers and pipes on a 2005 MH with Chevy 8.1 vortec engine on a workhorse frame.

thanks
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Old 08-03-2017, 01:50 PM   #2
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Originally Posted by sinjin79 View Post
Does anyone know of a good national parts outlet for the best prices on RV exhaust parts?

I am replacing both mufflers and pipes on a 2005 MH with Chevy 8.1 vortec engine on a workhorse frame.

thanks
I had this problem with an older Dodge motorhome years ago. I never found the actual parts. Instead, I took the rig to a local muffler shop. They installed a replacement muffler then bent new pipes from stock material. When I sold it many years later it was still working fine. It seems they use better material than what came on the vehicle. I highly recommend that route because they had to use a cutting torch to remove the old rusted bolts.
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Old 08-03-2017, 02:15 PM   #3
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Sorry I don't have any advice for you on that!

Good luck, happy trails, and God bless!
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Old 08-03-2017, 02:28 PM   #4
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Do you need the manifolds? How far back do you need to start with new pipe?

If you need manifolds I would bite the bullet and convert over to a banks system. Make sure you check closely they are often cracked from heat.

As far as the rest. It would depend on if your MH manufacturer altered the route of the stock system. If they did you may have to have it built in the shop. If its stock then you would need the chassis info to order online.

I had a gander at my system on my 2004. so far its in ok shape but when the time comes Im putting in a banks system.

Oh and...there is a workhorse sub forum here. I would dig around there for more info.
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Old 08-03-2017, 04:42 PM   #5
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I 2nd the Banks system. It opens up the breathing of the engine both on intake and exhaust. I had a system on a 454 Chevy engine and was very pleased with it. The stock exhaust systems can be restrictive. They're not cheap, but are an excellent product.
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Old 08-03-2017, 09:38 PM   #6
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I have a diesel coach and I've replaced pipes through Ryder Truck - Heavy Duty Parts list.
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Old 08-04-2017, 12:10 PM   #7
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I think you'll find that a local muffler shop (not a National chain) will do the work better and at the same price or less than you can do it. If you want quiet free flowing exhaust, just install 5 ton truck mufflers. It's a standard muffler and is very quiet. You'll pay a fortune for brands like Borla, Magnum, etc. Really not needed on a motor home.
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Old 08-04-2017, 12:12 PM   #8
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I think you'll find that a local muffler shop (not a National chain) will do the work better and at the same price or less than you can do it. If you want quiet free flowing exhaust, just install 5 ton truck mufflers. It's a standard muffler and is very quiet. You'll pay a fortune for brands like Borla, Magnum, etc. Really not needed on a motor home.
I agree. We have a few old school shops still here in Los Angeles that have pit style docks to work easily on motorhomes and large trucks.
They can bend anything they want.
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Old 08-04-2017, 03:07 PM   #9
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Try Ultra RV, they have most Workhorse parts and because they are actually OEM, they fit.
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Old 08-05-2017, 07:58 AM   #10
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Thanks Dutch. At this point that's the plan.
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Old 08-05-2017, 08:05 AM   #11
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Try Ultra RV, they have most Workhorse parts and because they are actually OEM, they fit.
Thanks. I'll keep that in mind for sure.
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Old 08-06-2017, 11:52 AM   #12
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As a follow up I found a local exhaust & brake shop that is able to get and bend both mufflers and pipes for $380 I will pick up on Tuesday and take the parts with my MH to a truck repair shop for installation, 2 hours labor =$140. Total in replacing both mufflers $520.
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Old 08-06-2017, 02:45 PM   #13
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As a follow up I found a local exhaust & brake shop that is able to get and bend both mufflers and pipes for $380 I will pick up on Tuesday and take the parts with my MH to a truck repair shop for installation, 2 hours labor =$140. Total in replacing both mufflers $520.
Have you considered replacing the pipes with larger diameter ones to reduce back pressure? One of the cheapest improvements to any engine is to open up the breathing both intake and exhaust.
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Old 08-06-2017, 06:52 PM   #14
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What Chaser said, at a local muffler shop!!!
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