2021 2500 Exhaust Diameter

[Andrew5415]

Of course man.
Here is the link, as well as a couple of pics. Took a can of black high temp to the rest of the exhaust. Very happy with how it all turned out. Sorry not the best pics, needs a wash.

MBRP 18" Diesel Exhaust Tip

Check out the deal on MBRP 18" Diesel Exhaust Tip at XDP

www.xtremediesel.com

Did you cut the exhaust back and then bolt the tip on, or just slide the tip over the existing exhaust and leave it inside the tip?

 

[Bozo]

I think it’s that old pipe thang I.D O.D estimated. 4‘’ should be good to go. I put a 4’’ MBRP octagonal on my 19 as the stock pipe look drove me nuts! Nothing wrong with adding on an inch or so to a measurement but it’s probably not going to fool anyone .

Going down the slippery slope fast, my friend!

 

[My-O-My]

5” to 6”. Looks perfect imo.

I finally got my truck a couple weeks ago. So all know, the pipe diameter on the 2021 Cummins is 4” like the others in the past. I slipped a 4”-5” Banks on with a little room to play.

 

[WisHawk]

So what is the stock exhaust pipe size for a 2021 Cummins. OP said he ordered a 4" and it was to small and 5" fit perfect?
Post above says his is 4" ??
My truck has not arrived yet so I just can't go measure. My MBRP exhaust tip just came today. It is the 5" to 6" 18" long just what the OP has shown on his truck.

 

[My-O-My]

So what is the stock exhaust pipe size for a 2021 Cummins. OP said he ordered a 4" and it was to small and 5" fit perfect?
Post above says his is 4" ??
My truck has not arrived yet so I just can't go measure. My MBRP exhaust tip just came today. It is the 5" to 6" 18" long just what the OP has shown on his truck.

My 2021 3500 6.7 is 4”. That’s all I can tell you.

 

[My-O-My]

This is my Banks 4” to 5” tip. I painted the remainder of the pipe to the first hanger.

 

[WisHawk]

That looks real nice. Thanks you for the pic and response.
How long is the one you put on?
Guess I will be returning the one I received.
Have to say I am little upset with myself right now.

 

[My-O-My]

That looks real nice. Thanks you for the pic and response.
How long is the one you put on?
Guess I will be returning the one I received.
Have to say I am little upset with myself right now.

No problem. Here are the specs:

 

[boatdude1]

So what is the stock exhaust pipe size for a 2021 Cummins. OP said he ordered a 4" and it was to small and 5" fit perfect?
Post above says his is 4" ??
My truck has not arrived yet so I just can't go measure. My MBRP exhaust tip just came today. It is the 5" to 6" 18" long just what the OP has shown on his truck.

My 2021 3500 H.O. Is 4”.

 

[My-O-My]

I am assuming the issue the OP had was trying to slide his original 4” aftermarket tip directly onto the OEM slash cut pipe. As if the slash cut was a square cut instead of following the path of the slash cut pipe. If that makes any sense.

 

[WisHawk]

I am assuming the issue the OP had was trying to slide his original 4” aftermarket tip directly onto the OEM slash cut pipe. As if the slash cut was a square cut instead of following the path of the slash cut pipe. If that makes any sense.

After reading through this thread several times I agree with that statement.
Just surprised with it being 1" to big he was able to tighten it.

 

[Sponge60]

This is my Banks 4” to 5” tip. I painted the remainder of the pipe to the first hanger.

Did you have to cut or trim the factory pipe? Is the original pipe visible inside the new tip? Really like the look you achieved.

 

[My-O-My]

Did you have to cut or trim the factory pipe? Is the original pipe visible inside the new tip? Really like the look you achieved.

Thx. Yes I cut the OEM pipe back about 8-10 inches or so. U can see the cut pipe if u get down on the ground. The pipe is angled down so it’s hard to see the pipe inside.

 

[Sponge60]

Thx. Yes I cut the OEM pipe back about 8-10 inches or so. U can see the cut pipe if u get down on the ground. The pipe is angled down so it’s hard to see the pipe inside.

Thanks for the reply. Again, that looks really nice.