Odd exhaust question

[sebringjetta]

Ok so here is where i stand. I want a louder exhaust and lower egt's. I DO NOT care about more power so purchasing a tuner just so i can remove my dpf w/ out a CL seems like a waist of 600$+.

So 1st question if i remove my cat and leave the dpf in place will i throw a CL?

Next, if i purchase a 5" down pipe back exhaust (no muffler ") and purchase a cat delete pipe and have my shop cut and weld the dpf in place on the new exhaust and install the cat delet pipe on the turbo side will the exhaust be significantly louder. All im looking for is a louder exhaust like i had on my 6.0.
Thank you for your time.

[09Duramax]

the 6.4 isn't loud with a 5in strait pipe, so leaving the DPF in place even with no muffler or DOC will not make it louder....

[sebringjetta]

Originally Posted by 09Duramax

the 6.4 isn't loud with a 5in strait pipe, so leaving the DPF in place even with no muffler or DOC will not make it louder....

Thats what i was afraid of...

[08stroker250]

4" downpipe and 5" exhaust is pretty loud. It's not 6.0 or 7.3 loud, but it's definitely much louder than stock. If you're not wanting to delete the DPF, I would just leave it stock and put up with it being quiet.

[sebringjetta]

Originally Posted by 08stroker250

4" downpipe and 5" exhaust is pretty loud. It's not 6.0 or 7.3 loud, but it's definitely much louder than stock. If you're not wanting to delete the DPF, I would just leave it stock and put up with it being quiet.

The only way to get rid of the dpf is to buy a tuner correct?

[ARCTICCAT87]

Originally Posted by sebringjetta

The only way to get rid of the dpf is to buy a tuner correct?

That is correct ... Trust me if you did it you would never look back I can promise you that! Not to mention the better fuel mileage and reliably of the truck is worth its weight in gold. Just my 2 cents

[sebringjetta]

Originally Posted by ARCTICCAT87

That is correct ... Trust me if you did it you would never look back I can promise you that! Not to mention the better fuel mileage and reliably of the truck is worth its weight in gold. Just my 2 cents

If i did a 5" turbo back and h&s xrt would i need to do the egr delete? I know the xrt shuts off the egr so what that be enough? I really dont want to screw too much w/ my truck..sorry for all the questions...

[ARCTICCAT87]

Originally Posted by sebringjetta

If i did a 5" turbo back and h&s xrt would i need to do the egr delete? I know the xrt shuts off the egr so what that be enough? I really dont want to screw too much w/ my truck..sorry for all the questions...

No worries man that’s what these forums are here for, but no you don’t "Have" to but at some point from everything I’ve looked into its highly recommend. I know for myself it’ll be my next addition to my truck. Again all of this is for the reliability of your truck, the added power and whatnot is just a HUGE bonus!! But honestly a tuner, intake and DP back exhaust is all you really need to start off with.

[sebringjetta]

Originally Posted by ARCTICCAT87

No worries man that’s what these forums are here for, but no you don’t "Have" to but at some point from everything I’ve looked into its highly recommend. I know for myself it’ll be my next addition to my truck. Again all of this is for the reliability of your truck, the added power and whatnot is just a HUGE bonus!! But honestly a tuner, intake and DP back exhaust is all you really need to start off with.

Ok well ill just order a dp back exhaust and a programer this week...in order to get the best mpg do i leave it on the oem tune?

[ARCTICCAT87]

Originally Posted by sebringjetta

Ok well ill just order a dp back exhaust and a programer this week...in order to get the best mpg do i leave it on the oem tune?

I think that someone of a debatable question. I've read that the hotter the tune the better the fuel mileage but on the same token the hotter tune I feel like most people will have a heavier foot which will in turn make worse I feel mileage. In my personal opinion you will just have to do it on your own and and see what works best for you. Many people have said that it's very truck specific on which tune will get the best fuel mileage. just experiment and have fun with your new toy!