I did it, but I wasn't concerned about sound in this truck... And its a good thing because it sounds like $hit. If your gonna straight pipe it, put something in place of the muffler too so you can maybe get an ex. note worth listening to. Just my .02

 

I run a dynomax race bullet, gives it a nice low tone. Still got a little hair dryer sound, I think you need a 5" exhaust to get rid of that.

 

I still have the factory muffler but the front half of the exhaust is deleted. sounds ok to me. i can't hear it inside the truck unless i'm on the go pedal hard. W/ the windows down, inside a parking garage i can hear it. Nothing special, good or bad.

 

Here's some vids of mine, first is with not cat/dpf and factory muffler and tailpipe. Second is with 4" MBRP filter back no muffler. All I got out of mine with the factory muffler in place was the hair dryer sound, which doesn't really bother me, but had no V8 tone at all. After MBRP I have some V8 tone now especially when going down the road and I think the hairdryer sound is less noticeable which I know alot of folks don't like. Its harder to hear the V8 tone at idle in the second vid but I can hear it going down the road. To bad can't sound like a 6.0 lol. Sorry for the crappy vids, 1st is really bad, thought might help though.

 

I was wondering how a filter back mbrp would sound with a dpf cat delete, sounds a lot better than my stock exhaust minus the deletes, i wonder how a full mbrp would sound? with and without a muffler.

 

I use the factory muffler with DPF delete only and it sounds great to me. I hate the sound of a straight pipe.

 

I use the factory muffler with DPF delete only and it sounds great to me.

You shouldnt have any problems with sound then, but i would delete the cat...

 

Guess it can't hurt to try it with the stock muffler.

 

The “muffler” is more of a resonator. It is just straight through, no baffles, nothing.

 

Taking the muffler off made more of a differnance than I thought it would, 4" exhaust helps to.

 

There is a guy on you tube with a magnaflow exhaust with a muffler and it sounds great, cant remember if its filter back or not

 

Quick question.. I still have stock exhaust but dpf/doc delete.. Not really wanting to buy the whole assembly, but am looking at mbrp filter back straight pipe.. Would 5" over 4" make any differences as far as temps or sound being that it is only 4" or 5" from the filter delete back?

 

That's what I bought back in the day. 5" MBRP filter back. I personally think the 5" has a deeper tone to it. I'd buy 5" again.

 

I was thinking the same thing, but after seeing the price difference in filter back from 4" to 5'', im going to go with 4" and save a 100+

 

Check out the prices on a diamond eye 5" kit. I bought from Rudy's and spent only a couple dollars more than a 4", like less than $20 difference. They just released their race kits so I don't know if it was special pricing or not but I paid way less for a whole kit than many filter back setups.

 

I believe when I put the 4" downpipe on my truck it made a slightly throatier sound. Also I would get rid of the cat and just put a whole new exhaust on the truck. I had mine straight piped and liked the sound of it with the downpipe, but I didn't like the drone on the highway so I put a hi-flow muffler from a big rig on there so I didn't loose performance just the drone.

Jeff (08stroker250) had just done the same thing in a 5" set up and it sounded way different. Really cool too.

 

Sounds good to me, i think ill just go with the 4'' down pipe and a 5" exhaust back, ill try with and without a muffler, i dont mind the hair dryer sound, i just want that v8 to come out a bit more without having to romp the throttle

 

I have been running the stock muffler on back to the stock tips for a year now with DPF/CAT delete. Most love the sound of the Kentucky hairdryer. It is barley noticeable in the cab unless the passenger window is down. It is much louder overall than stock. I am ready to delete the factory muffler though in hopes it frees things up a bit.......