• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Why so many Cats?

Kim

Well-Known Member
Joined
Mar 28, 2016
Messages
98
Reaction score
346
Points
53
Location
Wisconsin
Vehicle Year
2001
Make / Model
Ford Ranger
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
2WD
Thanks guys!
AFAIK it's not a FlexFuel engine, as I've seen nothing anywhere on the truck that says it is or might be. I'm not having any problems with them and wasn't planning on deleting any. Just curious as to why there needed to be 5 of them! As a perspective here's a few examples by decade of previous vehicles I owned:

74 AMC Matador Coupe 304 2bbl = no cat
82 Pontiac Trans Am 305 Cease-Fire Injection = 1 cat
94 Ford Thunderbird 4.6 SOHC = 3 cats
01 Ford Ranger Edge 3.0 = 5 cats = a meth addict's dream!
 


Deiimos

New Member
Joined
Dec 14, 2021
Messages
22
Reaction score
10
Points
3
Location
Ohio
Vehicle Year
2001
Make / Model
Ford Ranger XLT
Engine Type
3.0 V6
Transmission
Automatic
2WD / 4WD
2WD
I didn’t count them, but was under mine yesterday welding the flange between two of the cats as it is rusted / separating and getting too loud. It’s better now, but I had a moment where I told myself it seemed like a lot of cats in the system.

Edit: I did finally count them out of curiosity, and it appears to be five like the OP's post / photos.

My 95 Lincoln Town Car has four last I recall.
 
Last edited:

sgtsandman

Aircraft Fuel Tank Diver
Forum Moderator
Supporting Member
U.S. Military - Active
TRS 20th Anniversary
TRS Event Participant
Ham Radio Operator
GMRS Radio License
Joined
Mar 11, 2017
Messages
8,465
Reaction score
6,245
Points
113
Location
Aliquippa, PA
Vehicle Year
2011
Make / Model
Ford Ranger XLT
Engine Type
4.0 V6
Engine Size
4.0 SOHC
Transmission
Manual
2WD / 4WD
4WD
Total Lift
Pre-2008 lift
Tire Size
31X10.5R15
I suppose some of it has to do with the emissions standards it was built to meet (California vs 48 State). Some of it will be due to the engine in the truck. It may also be due to space considerations and more cats were needed to meet the emissions level they were looking for.

This is all a guess though.

My RWD 1998 with a 2.5 Lima only had one and my 4X4 2011 with a 4.0 has one on each bank. I can’t remember for sure but I think my 4X4 2019 with a 2.3 Ecoboost only has one. And none of them are California emissions.
 

cbxer55

Well-Known Member
Joined
Oct 9, 2009
Messages
1,574
Reaction score
431
Points
83
Location
Midwest City, Oklahoma
Vehicle Year
1998
Make / Model
Ford
Engine Size
3.0
Transmission
Automatic
My 98 Ranger 3.0 is a CA model. It has three iirc. One on each side and one large one in the back. My 2007 4.0 Mustang only has two, one on each bank. But the previous owner did some mods to it, not sure if it had one behind the Y under the vehicle. Doesn't now.
 
Last edited:

Kim

Well-Known Member
Joined
Mar 28, 2016
Messages
98
Reaction score
346
Points
53
Location
Wisconsin
Vehicle Year
2001
Make / Model
Ford Ranger
Engine Type
3.0 V6
Engine Size
3.0L
Transmission
Manual
2WD / 4WD
2WD
Normally, there is only one pre-cat each side of the Y-pipe and then one or two main cats after the Y-pipe. Your left side of the Y-pipe with the two cats kind of looks like it is not OEM. Are you sure it has not been repaired at some time?
I did find a few places selling the Y-pipe with cats. Here's one that has the cheapo wrinkle-bend pipes and 3 cats:

s-l1600.jpg
 

Sponsored Ad


Sponsored Ad

Top