Finding the Right 18-Inch Turndown Exhaust Tip for RVs

[8Muddypaws]

I was finally able to work on the rig yesterday and installed the new DQ6050 desiccant filter. What a job that is! It’s almost as difficult as changing the air filter.

Along the way I noticed that my exhaust tip has rusted to the point that it has a hole in it.

The pipe is 18 inches from the mounting end to the tip, has an ID of 5 inches and is turned down about 90 degrees at the tip. I haven’t been able to find anything even close so far. They seem to go from 12 to 24 inches with nothing in between. I’m kinda leery of buying one on Amazon.

Any tips? (Pun intended)

Thanks,
Russ

 

[RayIN]

Amazon lists several 18" long; I bought the 16" long SST tip. So far I've been happy with longevity and looks. Doesn't look like an 18" length is made from SST though.

 

[John From Detroit]

The pipe is 18 inches from the mounting end to the tip, has an ID of 5 inches and is turned down about 90 degrees at the tip. I haven’t been able to find anything even close so far. They seem to go from 12 to 24 inches with nothing in between. I’m kinda leery of buying one on Amazon.

There are truck specality shops or you might visit a good Chrome Shop (Semii truck bling)
Google the I-80 truck stop it's one of many . Or just click

i-80 truck stop - Bing

Intelligent search from Bing makes it easier to quickly find what you’re looking for and rewards you.

www.bing.com

I've beween there (Fuel stop)

Option two is a "Truck mufflers-R-Us type store (Far as I know none by that name but I suspect you get the meaning) Ask a Trucker for info. That kind of thing is easy for me in multipe countries as I chat with a lot of 'em but.. alas for you .. Dine at a truck stop.

 

[8Muddypaws]

I decided to get a readily available 16 inch turndown pipe. It sticks out too far and 2 inches will not be a huge difference.

 

[John From Detroit]

I decided to get a readily available 16 inch turndown pipe. It sticks out too far and 2 inches will not be a huge difference.

You can likely trim a bit off with a power cutter to shorten the extra stick out.

Or ... Might be better as it is. Two inches more distance between vehicle and exhaust might be a good thing.

 

[8Muddypaws]

I found exactly what I needed on Amazon, 18 inches, flared, without an integrated clamp. Decent reviews and only $75.

 

[Professor David]

Let us know if it lasts over the long haul. I bought this one that claims to be stainless steel about a year ago. It's already starting to look bad...surface rusty.

Amazon.com

 

[8Muddypaws]

Chinese stainless ain’t very good.

I’m more worried about how I’m going to get the old one off at this point. I did some mufflers & pipes in my youth and remember that they can be pretty stubborn.

 

[Professor David]

Are they welded on?

 

[8Muddypaws]

No. Clumped on and one of the clumps is a hanger. I intend to reuse both clamps because the haven’t rusted at all.

 

[8Muddypaws]

Clumped? Autocorrect is not my best friend.

Old tip removed.
New tip installed.
Old is ugly.
New is shiny.

Was not as difficult as I feared.

9/16” socket. Propane torch. Air hammer: borrowed. Less than 90 minutes working alone.

 

[RayIN]

Let us know if it lasts over the long haul. I bought this one that claims to be stainless steel about a year ago. It's already starting to look bad...surface rusty.

Amazon.com

Cheaper grades of SST have more carbon in them, some are even magnetic.

 

[Professor David]

Cheaper grades of SST have more carbon in them, some are even magnetic.

Another example of you (mostly) get what you pay for.

 

[8Muddypaws]

I don’t expect this one to last very long. It’s not stainless steel.

 

[House Husband]

Would you consider turning the tip to the rear? When you pass by us you stir up dust from your exhaust.
Thanks for your consideration.

Richard

 

[8Muddypaws]

I turned it that way to direct some of the heat away from our toad. The front left tire runs about 40F hotter that all the other tires. If I find that this makes no difference I’ll turn it down again. (But I think straight down will actually blow up more dust in unpaved areas)

I promise not to go anywhere near Missouri.

 

[Gary RV_Wizard]

turned it that way to direct some of the heat away from our toad.

I did the same thing with my DP. Straight down heated up the toad a lot on that side, plus it literally dug a hole in the ground or pavement when I fired up the engine a couple minutes before departure. After some experimentation I found that an angle of about 25 degrees outward dissipated the heat & pressure without blasting things along side (like my leg as I walked around the coach). The toad was fine with that.

 

[8Muddypaws]

I’m in good company then!