Exhaust improvements

[Horsestrokin]

I guess I'm going to stay with the the stock 3.5 pipes, but getting the kitty removed, I dont care for alot of noise, And I dont plan to race anyone, or take it to the track so I want to leave the muffer, but wondering if its worth another $135 to replace it with a freer flow muffler for more power and or fuel mileage. Will plan on a programmer after I get my EGT probe installed.

Anyone have a similar experience they can comment on?

[smokersteve]

If you are going to choose between the cat and the muffler, delete the muffler.

[smokersteve]

If you keep looking you can find a cheaper flow through muffler.

[Horsestrokin]

Steve,

lol...I was looking at it after dark tonight, ....that muffler is much larger than the cat. I was thinking it would be the opposite esp when it comes to resistance to exhust flow


Leaving the Cat, I wonder how that changes the sound vs a strait pipe 3.5 inch.. Now I'm thinking about deleting both, cuase isnt it often that a cat plugs up from all the carbon poop?

[pizza pig]

what are you nuts, that cat is as restrictive as that muffler.

My suggestion if you really dont want to remove the stock exhaust, is do a cat delete pipe and a 35-35xl aero turbine muffler for get the flow and quiet tone like you want.

But if you do any towing or harder driving, i would do a 4 inch turboback straightpipe and throw a aero turbine 4040xl muffler on it

the 4 inch will drop our egt's considerably over the 3.5 inch

[smokersteve]

Quiet Exhaust

new truck time for a new exhaust need pointers on price/type

muffler or cat???

[smokersteve]

Originally Posted by pizza pig

what are you nuts, that cat is as restrictive as that muffler.

My suggestion if you really dont want to remove the stock exhaust, is do a cat delete pipe and a 35-35xl aero turbine muffler for get the flow and quiet tone like you want.

But if you do any towing or harder driving, i would do a 4 inch turboback straightpipe and throw a aero turbine 4040xl muffler on it

the 4 inch will drop our egt's considerably over the 3.5 inch

For stockish trucks, the difference between egt's with delete pipes and a full 4" TB, is little.


if you want to get a 3.5 to 4" or full 4" TB, here is a cheap site.

US Diesel Parts: High Performance Diesel Parts for Duramax, Cummins and Power Stroke

[Horsestrokin]

Smoker steve

What is this: a double layer exhaust tip with packing in the 2 walls and that decreased some of the SSSSSSHHHHHHHHHHHHHH sound from a straight pipe.


I didnt understand it....Maybe I need another beer

[smokersteve]

Originally Posted by Horsestrokin

Smoker steve

What is this: a double layer exhaust tip with packing in the 2 walls and that decreased some of the SSSSSSHHHHHHHHHHHHHH sound from a straight pipe.


I didn't understand it....Maybe I need another beer

It was from kregan O'reilly auto parts.

It has 2 layers of metal. The outer has the chrome look. the inner has perforations. in between the 2 metal layers is some kind of wrapping.

I am looking for pictures right now.

[smokersteve]

it is not the same but same concept.

3A RACING Round HKS Style EXHAUST TIP [62-1456] - $16.80 : Muffler Mall, Performance Muffler, Universal Muffler, Stainless Steel Mufflers, Exhaust Tips