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shawn casey
Dodge Dakota
1/01/2002
15:27:52
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 Subject: CAT FREE Y-PIPE
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Message:
I WAS CONSIDERING REMOVING MY CATS AND INSTALLING A KAT BOX FOR TRACK USE ONLY! DOSE ANYBODY KNOW A MANUFACTURE WHO MAKES A CAT FREE Y-PIPE FOR A 2001 R/T?
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CW
GenIII
1/01/2002
16:30:09
|  RE: CAT FREE Y-PIPE
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Message:
I would think a Y-pipe off of a 2000 R/T would work I don't think they changed anything.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported throttle body, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, roadmaster active suspention
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Snakebyte
Dodge Dakota
1/01/2002
18:26:23
| RE: CAT FREE Y-PIPE
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Message:
I was wondering about this also. I had an off-road h-pipe on my '99 Cobra, and it was the best mod I did to it by far(sound, performance, and price). I need more sound for my 4.7, and not just a cat-back or muffler, I want it LOUD. Does anybody make an offroad y-pipe for the 4.7? Or is the only route to buy another stock y-pipe and gut the cats?
'02 Dakota
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CW
GenIII
1/01/2002
19:04:32
| RE: CAT FREE Y-PIPE
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Message:
Snakebyte:
I was looking under a 2001 durango and it had just the main cat and no precats. Also I have heard that the 2002 ram Y-pipe is ¼ inch bigger than the dakota 4.7. But I don't know if they have the precats. I am sure it would bolt up and then you could make your own exhaust from there. Damn aftermarket needs to get into gear.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported throttle body, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, roadmaster active suspention
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Jeffster
Dodge Dakota
1/01/2002
20:48:53
| RE: CAT FREE Y-PIPE
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Message:
CW I beleive the 2 pre cats came in during 2001. If it was an early 2001 Durango then that's probably the reason for no pre cats. I have no main cat and 3" exaust to the Y pipe. It's very loud and made a good dif in performance. The pre cats are suppose to be fairly free flowing but I will probably lose them in the future and run a 3" in 3" out single high flow cat for emissions once a more stout Y pipe is available. Is there a cat box for our aplication?
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CW
GenIII
1/01/2002
20:59:28
| RE: CAT FREE Y-PIPE
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Message:
I meant to say 2002 durango. I am sure it was one that I was doing a PDI on but I could be wrong next time I will look for sure to see. I looked under a 2002 1500 truck at work today and it has no precats but to buy the Y-pipe the main cat is right on the end of it. I am sure it will be 500+ for that so that is out.
You have to hard wire the catbox at the moment for our application I think Bernd is working on a connector for it but you would have to ask him.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported throttle body, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, roadmaster active suspention
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toast
Dodge Dakota
1/01/2002
23:30:16
| RE: CAT FREE Y-PIPE
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Message:
Guys i would recomend not doing this because the pre cats are better flowing that just one big one. I have an 02 R/T with the 3 cat system and what i was going to do when i get me headers on is keep the two pre cats on and remove the main cat and convert the whole system to true duel exhaust.
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CW
GenIII
1/02/2002
09:32:52
| RE: CAT FREE Y-PIPE
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Message:
I am planning something symilar but a 3" single depending if I go with a supercharger or not.
2001 RC 4.7 5sp 9.25" 3.92 LSD
Ported throttle body, IAT adjuster, 3" flowmaster cat back, TPS @ .76V, 4" cold air, roadmaster active suspention
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conig
Dodge Dakota
1/02/2002
13:27:13
| RE: CAT FREE Y-PIPE
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Message:
the precats may be highflowing, but the closer the restriction to the exhaust ports the more restrictive it is.
what would be the point of freeing everything else up behind the restriction?
this is also probable why the 4.7l only gets 1hp give or take from a catback exhaust, and duner got 20hp(I think can't remember the right number)from a highflow cat. he also has the singal cat y-pipe from the factory.
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Jeffster
Dodge Dakota
1/02/2002
20:25:39
| RE: CAT FREE Y-PIPE
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Message:
No doubt about your claims conig. My 3" cat back did nothing for real power gains but when I removed the main cat and extended the 3" exaust to the Y pipe it made a very noticable dif. At first I was concerened I screwed up because it felt weak but once the PCM learned to deal with the high flow it perked up very very nicely. I still have the pre cats but will pull them once I find a good stout Y pipe that's better than the stock pipe. I will then use a single high flow cat to maintian some sort of pollution control.
Is a cat box avialable for the 2001 4.7??
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Muzzy
Dodge Dakota
1/04/2002
06:26:28
|  RE: CAT FREE Y-PIPE
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Message:
The cat box is available for the 2001 4.7L. You have to buy a pair of them. Bernd sells them off his site for $125 a pair. www.speedtweaks.net
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shawn casey
Dodge Dakota
1/06/2002
11:18:04
| RE: CAT FREE Y-PIPE
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Message:
I am trying to get KRC performance to make me a Y-Pipe will let you know how it goes.
Casey
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