DOC Removal
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Senior User
Joined: Apr 2017
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From: Houston, TX
DOC Removal
So I'm going to delete the DOC this weekend. I should have done it the first time but I was in such a rush I bought a DPF delete pipe only...that bolted up to the flange on the DOC.
I read a post from speakerfritz and he mentioned "What is burning off the soot collection in the DOC if the truck isn't regening anymore?" And I thought "Oh crap! That makes sense. I better get that off too."
Anyway...Will I notice anything different? How it drives? How it sounds? Anything? I have the stock 3.5" exhaust and am going in with the 4" Flo-Pro delete pipes that are supposed to fit up with the stock tubing on either end.
Also, does anyone happen to know the part number for the flange gasket that sits between the DOC and DPF? I'm going to need another one if I ever have to slap the emissions equipment back on for inspection. Or do I?
I read a post from speakerfritz and he mentioned "What is burning off the soot collection in the DOC if the truck isn't regening anymore?" And I thought "Oh crap! That makes sense. I better get that off too."
Anyway...Will I notice anything different? How it drives? How it sounds? Anything? I have the stock 3.5" exhaust and am going in with the 4" Flo-Pro delete pipes that are supposed to fit up with the stock tubing on either end.
Also, does anyone happen to know the part number for the flange gasket that sits between the DOC and DPF? I'm going to need another one if I ever have to slap the emissions equipment back on for inspection. Or do I?
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Joined: Jul 2005
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From: San Jose, CA
The CAT doesn't really do much in terms of flow restriction at normal driving habits since it's flow-through. Soot accumulation simply blows through and out...which makes sense since I've haven't heard anyone complain about plugged up CAT's in the 6.0's.
I do note a caked on layer of soot build on the pipe walls though... like cholesterol build-up in arteries... but it seems that all eventually falls off and blows out also.
I do note a caked on layer of soot build on the pipe walls though... like cholesterol build-up in arteries... but it seems that all eventually falls off and blows out also.
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Senior User
Joined: Apr 2017
Posts: 343
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From: Houston, TX
The CAT doesn't really do much in terms of flow restriction at normal driving habits since it's flow-through. Soot accumulation simply blows through and out...which makes sense since I've haven't heard anyone complain about plugged up CAT's in the 6.0's.
I do note a caked on layer of soot build on the pipe walls though... like cholesterol build-up in arteries... but it seems that all eventually falls off and blows out also.
I do note a caked on layer of soot build on the pipe walls though... like cholesterol build-up in arteries... but it seems that all eventually falls off and blows out also.
Thanks for that aquaman. What you say makes sense. I would've had a clogged CAT by the time I took it off if that was possible. It was pretty caked up on the walls when I removed it finally. I needed to get it removed anyway I suppose. Besides...my truck sounds like an F-16 jet engine out the tailpipe now. It's crazy. One thing I do notice is less soot out of the tailpipe when I get on it a little...I assume that's because I'm not blowing out the caked on layers in the CAT anymore.
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