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Old 01-29-2008, 04:28 PM   #1
leafs fan
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Default Random Technology cat question

I've decided on real borla headers. I already have a Rallitek catback. Now I need to decide on a cat. I am leaning towards the Random technology cat however I am just wondering if anyone has any experience with this specific product. I tried to search and only found one thread about how much it sucks and that wasnt helpfull. If you have experience with any sort of cat please post it. BTW its for a 05RS.
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Old 01-29-2008, 06:26 PM   #2
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I have it on my rs, i mean it def helped but i think it can vary person to person on how thye like it. It moves the power up a bit higher so cruisin around town could hurt a bit. Personally if I was to do it all over agian I woulda got a stromung HFC instead, I have their catback and i think the quality is just the best.

also just in case you didnt know you will have to lengthen your o2 sensor for a diff catpipe
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Old 01-29-2008, 08:25 PM   #3
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I own it and love it!

also, I havent had any sort of issue with the CEL.

go for it!
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Old 01-30-2008, 02:05 AM   #4
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Quote:
Originally Posted by piker28 View Post
It moves the power up a bit higher so cruisin around town could hurt a bit.
also just in case you didnt know you will have to lengthen your o2 sensor for a diff catpipe
Not sure what you mean by this, what would it hurt. Sorry it might just be me thats a little slow its 2am and I am at work.

Also could any exhaust shop lengthen the o2 sensor? and after you did that did you get any cel's.
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Old 01-30-2008, 02:14 AM   #5
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One more question to add, sorry but I never changed the cat on any of my cars before. How is the fitment on this product? On boxer4racing.com it looks to be a completely different shape then Stromungs cat.
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Old 01-30-2008, 03:05 AM   #6
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Quote:
Originally Posted by leafs fan View Post
One more question to add, sorry but I never changed the cat on any of my cars before. How is the fitment on this product? On boxer4racing.com it looks to be a completely different shape then Stromungs cat.

If you flip around one of the pictures, they look almost the same, just the CAT on one is a bit further back then the other. The last bend on the right seems a bit different though.






I am curious about all this too, because I plan on doing the same thing.
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Old 01-30-2008, 03:39 AM   #7
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ive heard nothing but good things about the stromung HFC, i plan on putting it on my car as soon as i can afford it. i havent heard about the random tech. at all yet, im pretty interested to know about that as well
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Old 01-30-2008, 05:02 AM   #8
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Originally Posted by 00scoob View Post
ive heard nothing but good things about the stromung HFC, i plan on putting it on my car as soon as i can afford it. i havent heard about the random tech. at all yet, im pretty interested to know about that as well

I heard that the Stromung HFC makes the exhaust note more raspy, but I'm not sure if thats true. Besides, that wouldn't keep me from getting it if its a good quality part.
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Old 01-30-2008, 05:56 AM   #9
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If you flip around one of the pictures, they look almost the same, just the CAT on one is a bit further back then the other. The last bend on the right seems a bit different though.






I am curious about all this too, because I plan on doing the same thing.
Yeah your right they do look the same now. I am just trying to figure out which is better quality, better performance gains and which wont ruin the sound of my rallitek catback. Ive heard a sound clip on youtube with stromung it does sound kinda rapsy but nothing with random tech. I guess the only way is to purchase one and try.
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Old 01-30-2008, 08:32 AM   #10
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Quote:
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I heard that the Stromung HFC makes the exhaust note more raspy, but I'm not sure if thats true. Besides, that wouldn't keep me from getting it if its a good quality part.
eh they are both the same thing, if you heard one raspy the other will be to.... Your best bet is find osmeone with one and see if you like it or not

uhh on my car my city mileage went down but highway went up, but that was ok since i drove more highway but now when i get stuck in traffic it sucks. No CEL, only comes on rarely during very cold days and i just erase it and it wont come back to another strange cold day.

You dont need an exhaust shop to lengthen a sensor if your scared in some other thread there was a guy who got a company to make a plug and play harness that made the sensor longer to fit
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Old 01-30-2008, 06:27 PM   #11
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Is this the what you are talking about
http://www.rallitek.com/rao2sesp.html
Sorry I am trying to figure this out. What is it about swapping the cat that sets off the CEL?
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Old 01-30-2008, 06:33 PM   #12
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you're replacing two regular cats with one hi-flo cat...how can it NOT throw a CEL?
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Old 01-30-2008, 06:40 PM   #13
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ive had mine on for around 28k miles and as i stated in my post, cel only comes on during very cold days and its random sometimes it wont sometimes it will a simple erase of it and its gone for awhile... also i have 0 cel fixes
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Old 01-31-2008, 07:24 AM   #14
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I've recently had the same thing happen to me. I got the P0420 code but only since it got really cold during winter. It just comes back (cleared it 3 times).

I've also read that wrapping the headers is one way to help. True?
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Old 01-31-2008, 08:30 AM   #15
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it can help but it can also hurt since it will stress the header more and shorten its life
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Old 01-31-2008, 03:10 PM   #16
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I recently replaced a Stromung cat with a Random Tech dual cat, the one pictured above, which actually has two cats instead of one. So far it is nowhere near as raspy as the Stromung, is better quality, and no CEL yet, although I haven't driven much on the highway where I would get a CEL with the Stromung.

Apparently having two cats, and having them up closer to the header rather than back at the end of the pipe helps avoid a CEL.

I wasn't happy with the Stromung since it came with a broken weld along one side of the cat, and was raspy. I do like my Stromung XA axle back though.
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Old 01-31-2008, 06:14 PM   #17
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Quote:
Originally Posted by Flaps View Post
I recently replaced a Stromung cat with a Random Tech dual cat, the one pictured above, which actually has two cats instead of one. So far it is nowhere near as raspy as the Stromung, is better quality, and no CEL yet, although I haven't driven much on the highway where I would get a CEL with the Stromung.

Apparently having two cats, and having them up closer to the header rather than back at the end of the pipe helps avoid a CEL.

I wasn't happy with the Stromung since it came with a broken weld along one side of the cat, and was raspy. I do like my Stromung XA axle back though.
Finally I get a response I needed to hear. How did you work your o2 sensor. Were there any problems with it? Did you have to lenghten it? Also what headers are you using? Lots of questions I know but I need answers before I go a head and order these parts.
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Old 01-31-2008, 08:02 PM   #18
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ok well if you wanted bad responses, my RT... the front flange looks like a monkey welded it and is def off a bit, the hanger to hook onto the tranny plate is way way off... and the holes for the header bolts are so big my nut almost slipped through it
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Old 01-31-2008, 08:37 PM   #19
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Hmmm.. there are so many things I could say about that last sentence but Ill just leave it alone.
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Old 01-31-2008, 08:51 PM   #20
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go for it
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Old 02-01-2008, 01:44 AM   #21
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ok well if you wanted bad responses, my RT... the front flange looks like a monkey welded it and is def off a bit, the hanger to hook onto the tranny plate is way way off... and the holes for the header bolts are so big my nut almost slipped through it

Not quit what I meant. I'm just curious about peoples experiences with this cat as this would be the first time I changed a catalytic converter and headers on a car. I just dont want to get in over my head. No offence was meant by that post......btw your not serious about that post are you????
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Old 02-01-2008, 03:34 PM   #22
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Originally Posted by leafs fan View Post
Finally I get a response I needed to hear. How did you work your o2 sensor. Were there any problems with it? Did you have to lenghten it? Also what headers are you using? Lots of questions I know but I need answers before I go a head and order these parts.
I put the rear O2 sensor directly in, and didn't use an extender like Rallitek or where ever sells, so I'll see over time if I need one to avoid the CEL.

Since the rear sensor is farther back than stock now, I had to extend the wires. In the past I did this by cutting the stock wires and soldering an extension in. This time though I went through Casper's Electronics and had them make me an extension using OEM plugs. Now I have a removable extension for the wiring that just plugs in like stock. See my previous thread here about that.

I'm using stainless steel TWE equal length headers, which I recently had ceramic coated as well.

The only problem I had with the Random Tech cat is the bolt holes on both flanges are slotted (I guess to allow it to mate up to different headers and mid-pipes) but the standard nuts they ship with the cat are a little too small and will go through the slotted holes. I just used really large washers to get around that problem.
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Old 02-01-2008, 05:11 PM   #23
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yes i am serious, i usually dont talk about it around because im assuming mine was just a bad one out the batch i mean it works but id rather a stromung instead
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Old 02-01-2008, 06:24 PM   #24
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Wanna trade? I have a Stromung
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Old 02-01-2008, 08:12 PM   #25
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OK, first off, random tech has two cat's. It has the dual one pictured above and it has the single canister style which is quite a bit cheaper and equally nice. RT in the very very early years of production had some shody products but their fit and finish has been greatly improved and perfected meaning it will bolt on no problem. The RT cat is a metallic substrate which is superior to the stromungs ceramic internals. The metallic is superior because it flows better and holds up better than ceramic. If you look around at all sorts of cats you will note most of them have ceramic internals and very few like the RT have a metallic substrate.

With that said, the Random Tech is the *better* product, but it all comes down to what you want to pay. Yes, the RT will sound better as well but with any flow cat you may have some rasp. The way to cure that is to get a resonator put in the midpipe. Running borla style headers AND a high flow cat means you're more likely than not to get a PO420 code and there's not much to do about it because even spacers and MIL fixes won't work all the time.
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