Catback vs. Turboback - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 17 Old 02-15-2014, 12:11 PM Thread Starter
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Catback vs. Turboback

I'm looking for a 4'' catback exhaust system. I don't really want my truck to be louder (its a 6.0) I just want the added whistle sound when its idling, not for it to actually be louder when driving it. Im just curious to know if the catback system will add any whistle.
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post #2 of 17 Old 02-15-2014, 12:19 PM
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Originally Posted by bweeks17 View Post
I'm looking for a 4'' catback exhaust system. I don't really want my truck to be louder (its a 6.0) I just want the added whistle sound when its idling, not for it to actually be louder when driving it. Im just curious to know if the catback system will add any whistle.
The cat will actually make it not whistle as would the muffler.
Does your state have emissions? If not than maybe a turbo back with kitty cat delete and a muffler delete if you want the loudest whistle.

I personally like having a muffler cause it does get very very loud

There's a few vendors on here that will be glad to give you a deal! And welcome to the org!
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post #3 of 17 Old 02-15-2014, 12:21 PM
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Get a turbo back that comes with a muffler, and that let's you keep ur cat. The turbo back systems have a larger downpipe which will allow it to breathe better, and they come with a muffler that flows much better than the stock one. You can even get a turbo back system that removes the cat, but comes with a high flow muffler, and it will still be pretty quiet.

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post #4 of 17 Old 02-15-2014, 12:23 PM
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The whistle will be muffled by the muffler and the cat...

So if you want the whistle, you'll have to remove the cat and muffler which is called straight piping.

That will make your truck loud though...

So it really makes no difference for what you want, but a turboback system is what you should get.

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post #5 of 17 Old 02-15-2014, 12:25 PM
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Welcome to the org. Odawg is right. I've been in his truck, and it has a ton of power but the exhaust isn't ungodly loud. Actually sounds really good. Now my trucks a different story lol. Ur best bet would get a turbo back that deletes the cat and has a good muffler. Depending on ur local emission laws, u might want to keep the cat and have some flanges installed on the new exhaust so u can install the cat for ur inspection, and then put the straight thru pipe back on when ur done with it.

I also know people who hollow out the cat and reinstall it so it isn't as obvious.

But always check with ur local emission laws before doing so.

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post #6 of 17 Old 02-15-2014, 12:28 PM
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^^^ Yep, what they said.

My truck is straight piped and it is LOUD when romping on the go fast pedal.

But that's the only time it's really loud...
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post #7 of 17 Old 02-15-2014, 12:37 PM Thread Starter
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Thanks for all the info! I was just looking at an AFE Large Bore HD Exhaust System and it said, turbo back but retains Cat does this mean it replaces down pipe but keeps stock cat?
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post #8 of 17 Old 02-15-2014, 01:01 PM
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I vote 03 turbo if you want whistle only
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post #9 of 17 Old 02-15-2014, 01:27 PM
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I noticed a decent increase in whistle when I went to a 4" pipe with a free flow big truck muffler and no cat. Other than the whistle, it's really not much louder than stock except when I really get on it. Even my wife thinks it sounds good.


2007 F-250 CC SB Lariat FX4 PSD
XDP coolant filter, Zerex ELC, blue spring, 4" turbo back exhaust, no cat,
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post #10 of 17 Old 02-15-2014, 01:30 PM
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you can just do a downpipe back system if you want whistle...

the right muffler will not effect turbo whistle at all
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