4 or 2 cats???
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Posting Guru
Joined: Sep 2005
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From: Oxford, CT
4 or 2 cats???
Does anyone know when Ford started to put 2 big cats in our trucks instead of 4 small ones??? I have a 4.6 and its a 2005...I beleive its an early 05, and when I went underneath the truck, I can clearly only see one on each side...
Senior User
Joined: Jan 2004
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From: Southern USA
OBDII required 2 cats per side (to pass emssions) since '96 or '97. all cars, & light trucks. I think certain larger engine sizes were exempt at the time, but emssions req. gets more strict as the yrs go by. paul
Laughing Gas
Joined: Oct 2005
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From: South Jersey
My 05 with the 5.4 has 4 cats. There are 2 pre-heaters off the exhaust manifolds, an 1 at the y pipe, and one after the y pipe. My truck has a build date of 6/05.
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Elder User
Joined: Jun 2006
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From: Fuquay Varina,NC
that is strange, on the 04 there are 2 cats on each side, all before the Y pipe. With the o2 sensors between them, making the removal of the rear ones painless
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From: Oxford, CT
Originally Posted by is300wrx
that's why I asked....I only have one on each side and then I have the Y pipe, I have nothing..i guess i should be a happy camper
sorry, I made a typo. I have nothing after the Y pipe :-)
