Which Exhuast?
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New User
Joined: Jun 2004
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From: Texas
Which Exhuast?
I have 7.3 2003 CC FX4Which exhaust system would be the best for towing big travel trailer. I have seen threads were people have replaced the muffler with a resonator for quietness. Would I loose any power with that set up and would it be cost effective to go that route ?
Last edited by stroker250; May 31, 2006 at 09:42 PM.
Post Fiend
Joined: Jul 2005
Posts: 14,582
Likes: 12
From: 21791
a mandrel-bent 4" system is really all you need. 5" is basically for sound and the pride of have a sewer pipe snaking under your truck. some claim EGT reduction too. try the MBRP system with a muffler, and if you have drone, you can add a resonator to help cut drone. or straight pipe it and never go back.... 
Freshman User
Joined: Apr 2005
Posts: 37
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From: Oro Station, Ontario
I went with a walker BTM and cat delete. I am very happy so far. There is about 100-150 degrees drop in egt's when towing and slightly better mpg. Not too loud but there is a nice rumble and if you are on any kind of budget it can't be beat.
Elder User
Joined: May 2005
Posts: 968
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From: Tennesee
stroker250,
While cutting out the stock muffler does hlep if you tow heavy you need ALL the EGT drop you can get. You would also be surprised at the number of systems we sell to folks that have already doen the muffler-ectomy and then still needed the extra EGT drop. They also tend to have a lot of noise complaints too. They ended up having to mess with the exhaust changes twice and it's just not worth it to most folks. Do it once and be done with it, the extra 1/2 in daimeter plus the mandrel bending makes a world of difference in CFM of flow rate.
We stock all the MBRP and AFE systems and can help you with any questions, just call if you need to.
Mark @ DPPI
While cutting out the stock muffler does hlep if you tow heavy you need ALL the EGT drop you can get. You would also be surprised at the number of systems we sell to folks that have already doen the muffler-ectomy and then still needed the extra EGT drop. They also tend to have a lot of noise complaints too. They ended up having to mess with the exhaust changes twice and it's just not worth it to most folks. Do it once and be done with it, the extra 1/2 in daimeter plus the mandrel bending makes a world of difference in CFM of flow rate.
We stock all the MBRP and AFE systems and can help you with any questions, just call if you need to.
Mark @ DPPI
Senior User
Joined: Aug 2004
Posts: 139
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From: Cape Cod MA
Just ordered a 4" straight pipe kit from the turbo back with a 4-5" stainless tip from Marko at MKO Diesels should be here Wednesday.I have read alot of good from the folks that have installed the system and I couldn't beat the price $310.00 with tip to the door.
JMACC
JMACC
Postmaster
Joined: Jun 2005
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From: New Hampshire
Originally Posted by JMACC
Just ordered a 4" straight pipe kit from the turbo back with a 4-5" stainless tip from Marko at MKO Diesels should be here Wednesday.I have read alot of good from the folks that have installed the system and I couldn't beat the price $310.00 with tip to the door.
JMACC
JMACC
Nut
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Joined: May 2002
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From: Claremore, Ok 74017
I personally bought a dynomax 4 in cause it was 250 for the kit, I did change my downpipe from another company and noticed an extra 50 degree drop going to a 3.5 inch downpipe. Its really a personal choice, I like my sytem, a little drone but not bad. Would at least recommend a 4 inch mandrel bend.
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Senior User
Joined: Feb 2004
Posts: 270
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From: Scranton, PA
A full 4" system will help lower EGTs, which are always a concern when towing. So in your case I would spring for the whole system. I recently installed a MBRP 4" system and it is not that much louder compared to stock inside the cab. From outside it is louder, but not too much.
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Senior User
Joined: Nov 2004
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From: Upstate NY
I also have a dynomax 4" Mandrel bent exhaust. I purchased it a few years ago, it was the cat-back system. It was around 300 bucks, the sound is not that bad, but I am looking to delete the cat. Oh and the system that I installed doesnt seem to have any rust(yet!)