cat removal
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New User
Joined: Jan 2009
Posts: 5
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From: Iowa
cat removal
I have a 06 F250 with a 6.0 diesel and ordered 4" turbo back exhaust just wondering if i needed the cat left on for the motor or will it hurt the motor if removed? live in Iowa so no worry about emission test don't have them. TIA
Hotshot
Joined: Aug 2006
Posts: 17,400
Likes: 319
From: Whittier, CA
It's fine to run without it. You'll hear a little more turbo whine. Lots of guys run these straight piped with no issues.
I had no cat, and I had it put it back on. I didn't care to hear the noise, and emissions are a concern here. I noticed absolutely no diffence in performance with or without the cat. So don't expect miracles. Lower EGT temps are probably the biggest plus.
I had no cat, and I had it put it back on. I didn't care to hear the noise, and emissions are a concern here. I noticed absolutely no diffence in performance with or without the cat. So don't expect miracles. Lower EGT temps are probably the biggest plus.
Posting Guru
Joined: May 2003
Posts: 1,990
Likes: 1
From: Middleburg, FL
Put an MRBP turbo back on mine last May and pulled the kitty out. No problems whatsoever with engine operation or performance. However, I'd recommend you keep your CAT around just in case emission testing/requirements change somewhere down the road and you need to put it back on. CATs are not exactly cheap and with the new administration I think emission testing/requirements are going to get a lot tighter.
Elder User
Joined: Jul 2008
Posts: 599
Likes: 0
From: Tucker, GA
Recently took mine off when I put in SCT custom tunes, primarily for EGT concerns. The added turbo whine is a bonus!
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FTE Legend
Joined: Jul 2005
Posts: 65,938
Likes: 1,432
From: Millersville, MD
Put an MRBP turbo back on mine last May and pulled the kitty out. No problems whatsoever with engine operation or performance. However, I'd recommend you keep your CAT around just in case emission testing/requirements change somewhere down the road and you need to put it back on. CATs are not exactly cheap and with the new administration I think emission testing/requirements are going to get a lot tighter.
I second the above! YOu'll LOVE the turbine sound, esp at high idle!
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Hotshot
Joined: Aug 2006
Posts: 17,400
Likes: 319
From: Whittier, CA
I don't understand guys who want to make the 6.0L louder than it already is. To each his own, of course.
Bud, I've seen your picture and I know you are old enough to have grown out of that!
Truth is, my senior ears can't really hear that pitch anyway. And I'm only 39.
Bud, I've seen your picture and I know you are old enough to have grown out of that!
Truth is, my senior ears can't really hear that pitch anyway. And I'm only 39.
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