Cats...
#1
#5
x2, but whatever its your truck and your choice.
You will need a custom tune to turn off the CEL. Performance shouldn't gain any with no cats since these trucks have a longer exhaust system than other vehicles, and its a 5,000lb truck, but it will definitely be loud.
You will need a custom tune to turn off the CEL. Performance shouldn't gain any with no cats since these trucks have a longer exhaust system than other vehicles, and its a 5,000lb truck, but it will definitely be loud.
Last edited by DarrenWS6; 10-25-2008 at 04:41 PM.
#6
#7
The rear converters are what really kill sound and the flow path, pre-cats are pretty much direct flowing as hi-flow converters are. If I was to have the pre-cats removed, I would throw the engine code, and economy would drop.
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#8
#9
You just can't run cat-less without a tune on those models..
#10
#11
Where did you get this info ? PO420 & 430 WILL NOT come with this mod and you'll still pass inspection.
It can't leak, you have to weld it together.
If you have data supporting your post , lets see it.
BTW - What do you mean ~ "In Time" ? - Wait , I think I know, are you talking about the failing three consecutive times before the light. 3 drive-cycles. ???
Nah, as long as the system doesn't leak , your good.
Last edited by jbrew; 10-25-2008 at 08:57 PM.
#12
No it doesn't ? Your still within parameters as long as you don't have a leak.
Where did you get this info ? PO420 & 430 WILL NOT come with this mod and you'll still pass inspection.
It can't leak, you have to weld it together.
If you have data supporting your post , lets see it.
Where did you get this info ? PO420 & 430 WILL NOT come with this mod and you'll still pass inspection.
It can't leak, you have to weld it together.
If you have data supporting your post , lets see it.
#13
I run gibson headers with true duals all the way to the back with 4" magnaflow tips on my 2005 5.4. I run one cat on each pipe and flowmaster mufflers with no problems. It has been this way since 8000 mile and my truck has about 50000 on it now. So it goes gibson headers to Cats then flowmaster mufflers true duals all the way back and sounds great.
Last edited by quadracer11; 10-25-2008 at 09:01 PM.
#14
I run gibson headers with true duals all the way to the back with 4" magnaflow tips. I run one cat on each pipe and flowmaster mufflers with no problems. It has been this way since 8000 mile and my truck has about 50000 on it now. So it goes gibson headers to Cats then flowmaster mufflers true duals all the way back and sounds great.
Yea , that's a better set up on these fords with a stock tune.
#15
I do not have any specific data, like I said i've seen in older postings that a couple people have got CELs after the work, I could probably search and find more information, but thats just what I have observed. I dont know from experience because I own a 2004, so I dont know.
You'll even get better mileage.