Best after market exhaust?

[JJB11B]

Aero Turbine Muffler...

[Special T]

My exhaust needed replacing so i just went bigger. I might add that ive never been able to roll any coal since i went bigger. Rapping it up or getting on it with a trailer blows no coal on my rig...

[WoodlandShooter]

LOL, I can kill all three lanes of traffic!!!

[Mudman]

Stock 4" is good with deletes.  If not that buy the cheapest one. My 05 has stock and a muffler but my kitty ran away.  Muffler might too.   The egt problem is timing/tuning fuel and the 9cm turbo.  Heck I can run 1300egt on stock tune pulling heavy up pass with alot of throttle at 2500rpm.  Our turbo is crap for towing. Its next on my list, not exhaust. (Twins? Hmm)

[WoodlandShooter]

I looked at the stock curves on  our '06 with EFI Live....that post injection event is where all the heat comes from

2200 to 2600 RPM, and the post injection event is off, but outside of that, it is adding fuel.

Under 2200 it is there to help spool the turbo, over 2600 it is there to help clean up the exhaust emissions

[Mudman]

I was told 3rd inj. event is emissions egr stuff and to quiet engine.  The programs use it to their advantage usually rather than disabling it.  Its not responsible for egt temps as the tunes control it completely.  An aftermarket turbo will be around 12cm-14cm exhaust so engine isnt choked.  The stock 9cm isnt good for towing temps but spools quick and low for driving.  Older dodges turbo was 12cm as well.  Tater built turbos-google him- is great upgrade of stockers and cheap and all original 351 turbo. I will likely go with Tater or atsAurora 3000k.

[baker5150]

Stock 4" is good with deletes.  If not that buy the cheapest one. My 05 has stock and a muffler but my kitty ran away.  Muffler might too.   The egt problem is timing/tuning fuel and the 9cm turbo.  Heck I can run 1300egt on stock tune pulling heavy up pass with alot of throttle at 2500rpm.  Our turbo is crap for towing. Its next on my list, not exhaust. (Twins? Hmm)

I dont tow with a tune.  Still need to build the trans.
1300 stock tune is high as hell   I never see anywhere near that pullin hard and heavy over 20.

[Mudman]

Really?  Interesting, 6.7 cummins? The 6.7 turbo I read can adjust from 9cm to 25cm.  What year truck? Stock?  With no tune loaded bed and 27'TT loaded probably around? 8500lbs? 5 people, gross around 19k.  Blewitt pass I layed her to the floor in direct drive stock tune and she ran around 1320egt at 35psi turbo.  I then put edge on tow tune and had some extra power but egts ran mid 1350's.  Put edge to 3 and could not hit her too hard, had to watch gauges but climbed just as well.  Keep in mind Im running 70+mph doing this pushing alot wind at elevation.  Love these cummins. 1300egt is normal max on stock truck these years.  I will not pull at anything over 1350egt sustained and I shoot for less of course.  EFI is best tunes by far but only for 06-up years.

[baker5150]

Really?  Interesting, 6.7 cummins? The 6.7 turbo I read can adjust from 9cm to 25cm.  What year truck? Stock?  With no tune loaded bed and 27'TT loaded probably around? 8500lbs? 5 people, gross around 19k.  Blewitt pass I layed her to the floor in direct drive stock tune and she ran around 1320egt at 35psi turbo.  I then put edge on tow tune and had some extra power but egts ran mid 1350's.  Put edge to 3 and could not hit her too hard, had to watch gauges but climbed just as well.  Keep in mind Im running 70+mph doing this pushing alot wind at elevation.  Love these cummins. 1300egt is normal max on stock truck these years.  I will not pull at anything over 1350egt sustained and I shoot for less of course.  EFI is best tunes by far but only for 06-up years.

I'm in a 06 5.9.   1250 is my max.  I can pull like hell in tow mode, just don't have the trans for it yet.   

[Mudman]

1250 is good.  If I could remember the link off a forum about Cummins testing their engine.  They tested cummins under 100% load 24hours for looong run, months I think. (prolly had remote oiler) egts were mid 1300's and everything was tip top, bearings piston etc.  So Cummins rating was 1300+egts.  Heck the 2nd gen hx35 at 12cm tows great but moves air easier with lower drive pressure but its a 235hp system too. If you running efi your temps will be lower than mine for sure.  Wish they would create efi for older 3rd gens.   These trans can take more then people think.  The boost launchs and racing etc is what kills em off.  Gentle and roll into it helps out alot.  TQ converter slip is first to go it seems but better safe than sorry.  I have worked mine hard with tunes for 25k but smart about it.  Oil and bands every 10k and still good shape at 125k total.

[Special T]

You guys could just use the 6 speed stick instead of those $6k juice boxes. An Automatic IS a wear item. I can buy a lot of clutches for the price of ONE of your rebuilds.

[baker5150]

You guys could just use the 6 speed stick instead of those $6k juice boxes. An Automatic IS a wear item. I can buy a lot of clutches for the price of ONE of your rebuilds.

I wanted a stick when I bought my truck new in 06.  But I need the wife to be comfortable driving it as well.
And the 06 manual has a lower rated towing capacity than the auto.

[Special T]

Ive done a combined weight of 30K Lbs from longview to skagit valley. They work fine for pulling trust me...

[baker5150]

1250 is good.  If I could remember the link off a forum about Cummins testing their engine.  They tested cummins under 100% load 24hours for looong run, months I think. (prolly had remote oiler) egts were mid 1300's and everything was tip top, bearings piston etc.  So Cummins rating was 1300+egts.  Heck the 2nd gen hx35 at 12cm tows great but moves air easier with lower drive pressure but its a 235hp system too. If you running efi your temps will be lower than mine for sure.  Wish they would create efi for older 3rd gens.   These trans can take more then people think.  The boost launchs and racing etc is what kills em off.  Gentle and roll into it helps out alot.  TQ converter slip is first to go it seems but better safe than sorry.  I have worked mine hard with tunes for 25k but smart about it.  Oil and bands every 10k and still good shape at 125k total.

My biggest worry on my trans is the temp.  When pulling in Tow mode the temps climb quickly.  Stock it will hold around 200 all day.
I need to install a lock up switch for the TC.  Lower temps pulling, more torque to the wheels, and better down hill braking. 

[Special T]

I would also add that Ive pulled 26k over the pass and back so many times I lost count. I used to put on 150k miles a year pulling my trailer.