Which Exhaust System?
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Freshman User
Joined: Jan 2010
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Which Exhaust System?
I always learn a lot from looking at the forum. Thanks to everyone who are so knowledgeable and willing to give your opinions. I admit I'm I'm sometimes lost with all the info however. And so I'm looking for advice. I have a 2003 7.3 with 154,000 miles. Its used as a daily driver and to pull our 12,500 fifth wheel on weekends and for a few weeks out of the year. I first replaced the intake and have a Riff Raff 6637 filter. I am running a programer on the third setting. Ordered guages, and now want to look at exhaust. Which exhaust system do you recommend? Do I need the "power elbow?" I will delete the catalytic converter, so what do you guys advise?
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
The math works out where a 4" does the trick until you go crazy on HP, turbo, injectors, and intake. I know a member that has heavy towing (but not racing) mods and he regrets going to 5" - his plan is to go back to 4".
Lead Driver
Joined: Jun 2003
Posts: 8,298
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From: Damon (South East Texas)
I have the 4'' MBRP 409 SS Turbo Back system. Great fit and has proved sufficient for towing/racing with a 450+rwhp engine. The sound is not overbearing, with the muffler in place, when towing. Some prefer to do the "muffler delete", but I'm getting a little too old for such things. 
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Freshman User
Joined: Jan 2010
Posts: 33
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I have the 4'' MBRP 409 SS Turbo Back system. Great fit and has proved sufficient for towing/racing with a 450+rwhp engine. The sound is not overbearing, with the muffler in place, when towing. Some prefer to do the "muffler delete", but I'm getting a little too old for such things.
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