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  #16  
Old 08-26-2009, 08:08 PM
surfer03133 surfer03133 is offline
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there are some high flow cats out there, but that's kinda a waste unless you get a high flow muffler and some equal length headers. in short, any one part of the exhaust that is changed out to a "performance" piece wouldn't see much gain until the rest of the system is changed to performance. all the manufacturers have that on the really small font no one reads
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  #17  
Old 08-27-2009, 02:40 PM
geezmo2001 geezmo2001 is offline
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Kinda like 'wasting' money on a cold air intake? My point was to get the entire package to flow like it overdosed on Exlax!!
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  #18  
Old 08-27-2009, 07:33 PM
mr.ranger mr.ranger is offline
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smooth move exlax!!

but yeah, you have to improve the entire exhaust system if you expect a noticable difference and just one part is useless
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  #19  
Old 09-19-2009, 05:08 PM
orgnlmrwiggles orgnlmrwiggles is offline
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im pretty sure removing your cat will make it really fucking loud if you know anything about racing... and it wont give you better performance but it will give you better gas mileage. any cop will be able to tell and pull you over by the sound and you will get a ticket and have to fix it if they dont tow your car first.. dont quote me, but im like 90% sure on all of this.
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  #20  
Old 09-20-2009, 11:14 AM
geezmo2001 geezmo2001 is offline
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There are very few race cars that even run mufflers, that is why they are loud. To the best of my knowledge even those vehicles with mufflers run the most free flowing ones on the market, therefore the the db level is high.
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  #21  
Old 09-20-2009, 08:17 PM
mr.ranger mr.ranger is offline
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Quote:
Originally Posted by orgnlmrwiggles View Post
im pretty sure removing your cat will make it really fucking loud if you know anything about racing... and it wont give you better performance but it will give you better gas mileage. any cop will be able to tell and pull you over by the sound and you will get a ticket and have to fix it if they dont tow your car first.. dont quote me, but im like 90% sure on all of this.
for sure it would be loud but you can also straignt pipe it and just empty-out the cat which make it less noticeable and still provide some backpressure to the engine
also, you will be totally screwed when you have to go for your emissions test
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  #22  
Old 10-23-2009, 03:10 PM
mr cribb mr cribb is offline
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I removed mine on my 83 with a 2.8 v6 only because it was clogged up due to blown having blown rings and it was stopping up the flow.

Realistically you shouldn't remove them at all but especially on models that run the OBDII set up. You will trip the engine light for a (failed) cat since that's all the rear O2 sensor is good for....lol (by that I mean it measures the flow from the cat.)
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  #23  
Old 03-08-2010, 11:05 PM
biged6464 biged6464 is offline
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Default Re: no cat in exhaust

back to basics, i have a '02 XLT 3.0 and i am getting a "cat back" exhaust put in here in FL. I'm going w/ a 2.25" center inlet/dual 2" outlets in a Fflowmaster 50 Series Delta Flow. by crawling under and giving a quick visual, i see a TON of cats on the factory y pipes/headers, only 1 (the last) o2 sensor is visible, it's after the 2 cats on each factory header feed into a single pipe, then ONE MORE cat THEN a last o2 sensor THEN another cat then some pipe, then the factory muffler, etc. I at LEAST am going to remove the last cat after the last o2 sensor and replace that easily accesible o2 sensor i see while its in the air at the shop. can i or should I try and get rid of the cat just before the last o2 sensor and just have the cats on the factory headers and tap into the new tubing w/ the new Bosch o2 sensor i have??? or is that a disaster? i'm dead set on at the very least getting rid of the last cat downstream from the final o2 sensor, TOTAL OVERKILL!!! comments please, i'm new to the FORD family.....
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  #24  
Old 03-29-2010, 10:15 AM
Diveno9 Diveno9 is offline
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Default Re: no cat in exhaust

i have an 86 ford ranger and my muffler fell off and it was realy loud so i assume it would be even louder if the cat fell off too i mean mine was just from the muffler down so im sure it would be just as loud if not worse wich if thats the case then you will probably run into some angry neighbors like i did untill you fix it.

any advice as far as sound quality goes?
i gota buddy that told me to put a thrush exhaust on mine but i dont wanna put it on unless i kno it will sound good.
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  #25  
Old 03-21-2014, 08:13 AM
Bassmansteven Bassmansteven is offline
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Default Re: no cat in exhaust

If you have a 3 cat system on your Ranger, you can dump the third cat, attach the sensor to a bung welded to the pipe, and go dual exhaust. the computer apparently cannot tell . . .

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  #26  
Old 03-21-2014, 08:14 AM
96_4x4_XLT 96_4x4_XLT is offline
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Quote:
Originally Posted by mr.ranger View Post
ive heard of people taking out their clogged cats but no replacing them and just letting the exhaust run..i was just wondering if this is bad for your car (no back-pressure?) and i obviously know its bad for the environment..also, wouldn;t it be excessively loud and could you get a ticket for the condition of your vehicle?? thanks
you need to cats
replace them
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  #27  
Old 03-21-2014, 09:47 AM
R4u2 R4u2 is offline
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Default Re: no cat in exhaust

Not only that your truck stinks like a 70's car exhaust, oh - some of you could be to young to remember that.
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  #28  
Old 03-21-2014, 02:10 PM
96_4x4_XLT 96_4x4_XLT is offline
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Quote:
Originally Posted by R4u2 View Post
Not only that your truck stinks like a 70's car exhaust, oh - some of you could be to young to remember that.
t-_-t lol
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  #29  
Old 03-28-2014, 04:36 PM
Insatiable_Ford Insatiable_Ford is offline
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Default Re: no cat in exhaust

I removed them on my 99 mustang Gt and it was a beautiful sound, and it did improve power ever so slightly - like maybe 3-5hp, after intake, throttle body, plenum, etc... But the car was also tuned and the 4.6's like to breath. Didnt get a single ticket for it, but it was also pretty low to the ground which meant people could see under it. I dont think it would do a thing on these 4.0's
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