Hi everyone I was just wondering if anyone makes a pair of high flow cats that will just bolt in to my 1998 ranger 4X4 xlt with 3.0 dual cats? Where can I find some or is there any other high flow cats that will work and not cause any trouble with the computer? I aslo would like to know when to replace O2 sensors and pvc valve my truck has 71,000 on her now and I just gave her a tune up with plugs,wires,and fuel filter!! any help would really be appreciated!!!

 

WIth OBD2 being what it is and being so demanding of emissions components, I am glad to save you money by letting you know that factory cats flow real, real, well. This isn't he crummy technology of the 70s and 80s.

As for O2's, wait for a CE light, pretty much. PCV can be checked whenever you feel.

 

Why are they two cats wouldn't one do the job and cause less restriction than two? What does each one do are they different some how or what?

 

You might want to just save the money and leave it as is. Believe it or not, sometimes back pressure is a good thing and too much free flow can sometimes change the power curve in an unproductive way.
Dono

 

yea i wouldnt touch these two, i did and i lose o2 sensors like crazy

Matt

 

Thanks guys I won't waist my money on cats! What other things can I look at to get some more power and mpg!