straight pipe cummins with pics

ok i had my "nelson" muffler break at both flanges on a trip. got it back home and found some 5" couplers and a stack off a mack truck i have, and made some straght 5" right from the manifold.

was pretty easy, took the flange from the muffler and welded a 4 1/2 to 5" coupler to it and ran some flex and couplers to a 90 and right to the stack. this is VERY LOUD. gurggles pretty good through the gears. louder than a whistler duece by far.

i did not cut or retrofit anything on this. i had a old exhaust flange for the stack and welded the 5" clamp to that. i wouldnt be surprised that i get pulled over for it, i can get a new muffler for $250 but thought i go and straight pipe on it for now.

i will be adding a 290 small cam turbo and jakes this fall, also ill be running 46" singles too. with pics to follow.........

I plan on pulling my muffler and piping it under the truck and out in front of the rear tires. I ran a similar set up on my other 5ton but with the stock muffler attached,it is very quiet inside the cab!!

Vinny

How do you intend to deal with the hood clearance problem when you add the turbo and the jake?
If you use this much, it won't take long for you to get tired of the noise.(or maybe go deaf, then there will be no issue).
nice project, good pics.
I added turbo to mine, make sure you get ALL the parts from the donor engine, manifolds, oil lines, ect.
I had to make a bunch of part runs for little stuff.

well i have a extra hood im going to raise all the way back with smooth curves, leaving room for the intake pipe and valve covers. the doner truck is a old carnival truck that i had on ebay and nobody wants cab over single axles no more and its good a good motor so we will see what happens.

I bet she is lowd

I have been thinking hard about doing this to my 5 ton. is there any way that you can post a short video of how she sounds? If not its cool I will just have to do it to my truck!

Good Job!

Lee in Alaska

where can you buy a new muffler for the cummins, mine blew out the back side, and its hard to weld back there.

i have new mufflers in stock $250 + shipping. iam not going to put a muffler on my 818 till i get pulled over. i have new j-pipes in stock as well call me
414-531-9772 brent

Why not take diameter measurements and get a Shorty muffler from parts store. I have in my garage a Muffler or Resonator, about 8 to 12inches long I was going to put on my Detroit diesel, but desided not too. Cost about $30.00.

instead of this thread is worthless without pics we need a logo for "" THIS THREAD IS WORTHLESS WITHOUT SOUND BITS """!!!!!!!!!!!!!!!!!!!!!!!!

I had an old IH Loadstar with a NHC250 and no muffler. I know how loud they are. I thought it was cool at the time but as I get older I start thinking about bringing unwanted attention to myself and hearing loss.

Alredneck said:

instead of this thread is worthless without pics we need a logo for "" THIS THREAD IS WORTHLESS WITHOUT SOUND BITS """!!!!!!!!!!!!!!!!!!!!!!!!

Click to expand...

bigelk50 said:

Click to expand...

Ditto on the sound/vid

im workin on it..... so hold your self together until then

On friday I am going to take my muffler off of the 818. I will post a video when I do

I've spend close to 9 hours in a 818 with no muffler, in the passenger seat. You can feel it in your chest if you have the window down, and you don't do that without ear plugs.

I had fun once.... wasn't nothing like that though.

I just want to try it, ir Its bad I can put it back on.

I drove a deuce 500 miles back without ear plugs, it didn't bother me too much .. that 818 BOTHERED me.

But hey, people will stop and look at you, and NO ONE is gonna change lanes into cause they didn't know your there.

Ha that is for sure. I have been around lots of straight piped equipment and semi trucks. one of the worst I ever drove was a single stacked screaming jimmy (detroit). It will be short lived, the wife a dog ride with me.