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Old 08-20-2001, 05:09 AM   #1 (permalink)
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Post Free Flow Cats?? Where to buy?

Where can i get a bolt in Free Flow cat for my 2.5L YJ?

thanks
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Old 08-20-2001, 06:57 AM   #2 (permalink)
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I vote for your local exaust shop. Talk with the guy there is always a deal to do.
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Old 08-20-2001, 07:11 AM   #3 (permalink)
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check summit or any 4 wheel catalogs
i don't know if you will acctually find a bolt in one
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Old 08-20-2001, 09:03 AM   #4 (permalink)
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4Wheel Drive Hardware?
Summit Racing?
Give 'em a shot!


Do you need a new cat or are you looking for horsepower. If the latter, I wouldn't expect too much. Contrary to myth, they don't cause much of a restriction at all. I know you mentioned your Jeep was running rich. The cat wouldn't cause that. I've heard if the oxygen sensor goes bad, the computer will run really rich, and you'll get some black smoke. Running rich will destroy the cat. I'm going through the same problems trying to get an '89 Daytona running right. It was blowing black smoke, so I got a new oxygen sensor and just put a new cat on it. It still does it, but not as bad as before. It's really lacking power and can barely pull itself up a hill. I had thought the convertor was plugged, but after the new one, it still bogs down. I was pissed <IMG SRC="smilies/mad.gif" border="0">. I'm gonna borrow a compression tester from my day and check it out. I hope I don't need to rip the head off <IMG SRC="smilies/frown.gif" border="0">

BTW, you should have seen the amount of soot that came out of that cat after I ripped it out <IMG SRC="smilies/eek.gif" border="0">. It was almost totally clogged. But even after the new one, it still dogs out <IMG SRC="smilies/mad.gif" border="0"> aaarrrrggghhhhh
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Old 08-20-2001, 09:47 AM   #5 (permalink)
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try Car Parts or Truck Performance. both of those should have them. truck performance usually runs pretty good deals throughout the year, so you might just get lucky.

if it was me, i would just use a sawzal, hammer, and a long shaft screwdriver. that method has worked wonders for me in the past.
<IMG SRC="smilies/wink.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0">

and as for the power benefits, you should, FEEL a great improvement. i know i have on a 302, cobra 302, 318 and two 258's. i have read before that you can actualy gain up to 30% more horsepower on certain applications. i believe it b/c i've felt it.

JUST REMEMBER TO RESET YOUR COMPUTER!

good luck- russel
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Old 08-20-2001, 10:46 AM   #6 (permalink)
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So you're sayin' that a 200 HP engine has the potential to be 260 HP just by removing the cat? I don't think so, mmmkkkkayyyy. You might feel a slight difference, but 30%, I doubt that very much!
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Old 08-20-2001, 10:57 AM   #7 (permalink)
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Here's another one:
http://www.randomtechnology.com
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Old 08-20-2001, 11:00 AM   #8 (permalink)
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after I got my cat back system on my camaro I just got a pipe welded between the headers and the exhaust system, then when It became time to get emmsions i bought one from summit. I noticed no difference in power and It made it a little bit quieter.
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Old 08-20-2001, 02:44 PM   #9 (permalink)
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Just gut it.
You know you want to. <IMG SRC="smilies/biggrin.gif" border="0">
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Old 08-20-2001, 03:01 PM   #10 (permalink)
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I got mine from Summit, and it came with clamps. Had it welded in for $15 though.

Paul
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Old 08-20-2001, 03:09 PM   #11 (permalink)
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Thanks For The Advice guys

I actually just went and got a "Bolt In" from Napa.

I am going to bolt it up with a new cat back, go get my new inspection sticker (before SOA) and then probably hollow out my old one and return the new one to Napa for a refund. I normally wouldnt do something liek this but the guys at my local napa are Such A=Holes

thanks for the advice
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Old 08-21-2001, 01:41 PM   #12 (permalink)
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Get one from Napa and then take it to your local exhaust shop and have them or your can make your own "test tube!" Bolt it in place of the cat and then replace the cat when needed for the Smog-Nasi or whatever.
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Old 08-21-2001, 02:11 PM   #13 (permalink)
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Quote:
Originally posted by olivesman:
<STRONG>and as for the power benefits, you should, FEEL a great improvement. i know i have on a 302, cobra 302, 318 and two 258's. i have read before that you can actualy gain up to 30% more horsepower on certain applications. i believe it b/c i've felt it.
</STRONG>
No way. Not unless there is something done to use the extra flow it will do you no good. Sorry, I just fail to belive this.

Leave your cats on all of you. It is not a performance gain and it is better for the enviroment. Plus it is illegal to tamper with your converter. If you must fiddle withit, replace it with a high flow unit.
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Old 08-22-2001, 05:14 AM   #14 (permalink)
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Dug,
Exactly! Everyone still thinks that cat convertors are such a HP drain. Maybe when they first came out, but the modern monolith convertors are pretty unrestrictive. Cut one open some time and look, you'll see why. The new ones aren't filled with pellets. It almost looks like a bundle of small straws, which the exhaust flows straight through. That's the best way I can describe it. I agree. Leave them on!
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Old 08-22-2001, 09:55 AM   #15 (permalink)
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Every one remmebers those old "BB" style cats from the GM cars. You want to talk about no flowin' chunks a waste!

A good monolith is the way to fly. If you make a bunch of power and run a bunch of air through the motor then a highflow is needed but for a stock 2.5 you don't really need it.

If you wanted to do *something* for it, maybe try getting a stock cat for a 4.0.

SOD RULES!
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Old 08-22-2001, 11:43 AM   #16 (permalink)
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Quote:
Originally posted by DUG:
<STRONG>SOD RULES!</STRONG>
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