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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 07-18-2007
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cat converter ?

rangers have 2 cats on them to reduce sound. if i took one off how much louder would my truck get, would any thing go wrong and would, i still pass emissions in PA
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Old 07-18-2007
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Quote:
Originally Posted by dbking321
rangers have 2 cats on them to reduce sound. if i took one off how much louder would my truck get, would any thing go wrong and would, i still pass emissions in PA
it would be louder, as far as passing the emissions testing, no, it wouldn't pass.
catalytic converters are on the truck for a reason.
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Old 07-18-2007
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just looked looks to have 3 1 off each header then the 2 pipes go in to a cat and one exits so if i took the last one off and make it so that the 2 pipes just went to one pipe to my muffler would this be legal still
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Old 07-18-2007
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if not legal then what can i do to get more rumble and be legal
i alreadt have amuffler and dont want to spend more than about 100
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Old 07-18-2007
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well, idk how strict PA's emissions laws are, but it sounds like you have a 3.0 like my dads, check out what hes selling.
https://www.ranger-forums.com/forum2...ad.php?t=46807
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Old 07-18-2007
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I thought certain years had 6 cats and others had 7?
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Old 07-18-2007
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Quote:
Originally Posted by firefighterjosh
I thought certain years had 6 cats and others had 7?
whoa, i don't think so.
thats alot of cats, i think the most ever put on a ranger were four.
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Old 07-18-2007
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I could have swore mine had alteast 6 I may be wrong
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Old 07-18-2007
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Depending on what year ranger you have you CAN remove cats. Alsong as they are all after the O2 sensors you can remove all you like because your truck will just be scanned according to OBD2 which cannot detect any cats after the O2 Sensors. So 96 or newer you can remove one or more possibly. Anything 95 and older I wouldnt mess with it.
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Old 07-19-2007
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i had to take off one of my cats after it got clogged. I had just a pipe running through it while i found a cat to fit. I have a flowmaster muffler and i would say its not worth the hassle. In my opinion, the sound just got uglier. just me.

My truck has 5 cats, 3 pre cats and the two main cats if you wanna count them seperately. it was one of the precats that got cut out.
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Old 07-19-2007
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i have a 4.0 thats why i put it here lol and i think one of theres days ill go to the muffler shop and see if its legal and how bout sound would it be louder but still keep my rumble
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Old 07-19-2007
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A muffler shop wont tell you removing cats is legal....because its not! My 2004 has 3 cats, 2 precats and one after the sensors. I punched out the 3rd one...
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Old 07-19-2007
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No ranger has ever had more than 4 cats from the factory...
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Old 07-19-2007
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Quote:
Originally Posted by firefighterjosh
I could have swore mine had alteast 6 I may be wrong
Yours is an 04, correct?

If it is you have 3 cats.
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Old 07-19-2007
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yup 04 and so i guess it a no go on the takin the cat out since every one sayys its illegal so what should i do if i want more noise and that good old loud rumble cause i got the rumble its just to quite
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Old 07-19-2007
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See if an exhaust shop will replace all your cats and put in 2 high-flow's coming off each bank.
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Old 07-19-2007
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Quote:
Originally Posted by 01xltranger4x4
See if an exhaust shop will replace all your cats and put in 2 high-flow's coming off each bank.
that would be a waste of money, all new cats are high flow from the factory.

if you want something loud, go with a flowmaster 40series si/do.
or just get a sawzaw and cut your muffer off, w/e floats your boat.
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Old 07-19-2007
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speaking of cats, i need to find a new one because mine has a small hole in the top....

i might have to goto a junkyard and cut one off a mustang or something, just for ****s and giggles.
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Old 07-19-2007
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so replacing the 3rd cat with a highflow would be a waste of time and money
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Old 07-19-2007
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I would say remove it with a Y pipe if you have no O2 sensors after it if you want more sound.
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Old 07-19-2007
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Quote:
Originally Posted by 5speedin2.3
if you want something loud, go with a flowmaster 40series si/do.
I second this, and just put dumps on the muffler outlets, you'll get your 'rumble'. My 3.0L with a si/do flow 40 dumped was louder than my friend's '95 F150 5.0L with no muffler (it pissed him off too ).. something to think about, having the flowmaster will most likely get you that 'rumble' you want.
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Old 07-23-2007
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Quote:
Originally Posted by 5speedin2.3
that would be a waste of money, all new cats are high flow from the factory.
Ok, you tell me which is going to be better for sound and flow.

3 or 4 OEM cats and a muffler

2 highflow's and a muffler

hmm?
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