after market exhaust

[weldinfool]

I recently put edge w/attitude great mod on my 05 GMC next in line is an exhaust upgrade.this is where it gets fuzzy for me


aluminized vs 409 vs 309
single vs duals
catback vs turbo back
x brand vs y brand vs z brand
code eliminator........when do you need one
seems like the perverbial can o worms.
i know i want to lower egt and improve performance, along with improved sound, but what else is there to be gained or lost? is it worth the effort and expense?
I pull a travel trailer,alot, sometimes 800 miles plus.pull a boat and utility trailer,and i really like to see the look of some kid in a so called hot rod get waxed by a diesel 4x4 4 door truck love my ride but i think it could be a little better and i want to make it last at least untill its paid 4 so any and all input would be greatly apppreciated

[More Power]

The good exhaust system dealers who run what they sell will have a solution for EGR codes "if" yours is affected. Might be a good idea to ask first. Several of the vendors listed in the Advertisers Page also offer exhaust systems. Give them a call...

Stainless or aluminized? Unless you detail the underside of your truck, they'll all look alike in a few weeks anyway. Each will last the same length of time (likely longer than you'll own the truck).

I'm considering going to a polished stainless shorty muffler and tailpipe on Lil Red just for the bling...

Jim

[Mark Craig]

weldinfool,

Well it depends on what truck you have LB7, LLY LBZ etc, not all of them need any foolers for the exhaust to stop a CEL, your signature didn't say what you had etc. Call us if you want, the discussion on aluminized, 409 and 304 can get really long and it really depends on you and how the truck is used and how long you intend to keep it etc. We stock all the MBRP and AFE systems in aluminized 409 and 304 and will be glad to help you.

Mark @ DPPI

[Kennedy]

Couple of quick comments:

Duals are loud. Regardless what anyone says they are loud. Also after seeing a set of MBRP duals smoke out the tailpipe joints while running open exit on the dyno, I'm not convinced that they are even equal to the performance of a single.

Cats hold heat. They also reduce flow. A full system is the best if you can get away with it. The Blocker pkg on my site will be necessary to nix codes if the cat is removed.

LLY Emissions:

http://www.kennedydiesel.com/docs/Du..._Emissions.htm

Dyno proven performance:

http://www.kennedydiesel.com/photoga...xhaust_lly.htm

[JD_Diesel]

so how does the diablo work for the egr system?

[Bobo]

so how does the diablo work for the egr system?

I like the sound of Kennedy's exhaust on the LLY and LB7 the best.


Diablo turns the codes off so you can block the EGR.

[Mark Craig]

Kennedy,

Hey John, if they were leaking at the joints then the clamps were not tightened enough. As far as HP or EGT and or restriction on duals vs singles on dyno's that I have seen you can usually see a slight (very slight) EGT drop on duals as compared to singles. It's very, very difficult to verify and duplicate exactly each time but having done it quite a few times I am pretty convinced it's there! Now it's not enough to matter but it does show that at the very worse the duals and the singles are equal restriction wise. I didn't notice that they have been any louder either, just that you have volume from two sides vs just one. Which also happens to be so the driver can hear it better etc.

Mark @ DPPI

[mikel310]

weldinfool,

Well it depends on what truck you have LB7, LLY LBZ etc, not all of them need any foolers for the exhaust to stop a CEL, your signature didn't say what you had etc. Call us if you want, the discussion on aluminized, 409 and 304 can get really long and it really depends on you and how the truck is used and how long you intend to keep it etc. We stock all the MBRP and AFE systems in aluminized 409 and 304 and will be glad to help you.
Mark @ DPPI

As the above quotes states, it depends on how & most importantly where you use your truck & goes far beyond on how the exhaust ends up looking like.

Both my friend and I have boats which we drop into the ocean by trailer. He had aluminized & I have stainless. His truck exhaust is already showing signs of corrosion due to the salt water & will be replacing it very soon with stainless, and mine is still corrosion free, so just be aware of your usage.

Mike