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Old 12-17-2002, 02:40 AM   #1
cvalle-sd
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Thumbs up Hi-Flow cat - 1st impression

I got a Cobb 1-piece that runs from stock 2.5 header into a strohmung mid and Sti v6 muffler. Took a while to install, smelled funny until the sticker cooked off (doh) SOUND TOTALLY CHANGED! Now it snarls on overrun, and resonates at a higher freq. - more hi-mid. I'm assuming this is due to the lighter (stainless) construction overall, straight-through flow, and larger diameter.

Anyone with similar/contrasting experiences?

PS - no CEL, feels stronger on the hi-end & throttle resp. improved.
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Old 12-17-2002, 04:22 AM   #2
cvalle-sd
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here it is, btw - this is the one with the metal substrate - MUCH lighter than the stocker

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Old 12-17-2002, 11:24 AM   #3
Slack
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How much did it cost? Just curious...that is different from the one on their site, so did you have to custom order it?


Mick
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Old 12-17-2002, 12:42 PM   #4
RSmatt
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Your hi-flow looks different from one I received from cobb. I got mine in august. The cat on mine is in the location of the 2nd cat on the stock piece. Maybe one of ours is a random tech hi-flow, and the others cobb? Either way I love mine. I had CEL for about a year before installing it. Now I'm 3 months CEL free.

My setup- Borla, Hi-flow, Rallispec single piece cat-back

Quote:
feels stronger on the hi-end & throttle resp. improved.
I agree

Later,
Matt
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Old 12-17-2002, 01:39 PM   #5
cvalle-sd
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It had a Random sticker on it - so I guess it's real Random.
I got lucky on ebay - it was less than a third of retail. I noticed how small the actual cat is vs. the one pictured on their site - maybe this was a working prototype that they didn't go with for some reason. I'll put up an "installed" pic later today - need more AA batteries, heh heh.
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Old 12-17-2002, 03:02 PM   #6
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The one you received was one from Random that we found during our move. After a lot of input from us what you received was the final version of the Random unit. The original had flex pipe and fitted very poor. The COBB cat is different from the one you got, and is now no longer available due to the fact that we are changing to our own header and cat soon.
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Old 12-17-2002, 10:43 PM   #7
cvalle-sd
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Ahhh - that explains why I need a donut to mate the cat and intermediate. gotcha.
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Old 12-17-2002, 10:53 PM   #8
cvalle-sd
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already golden brown!



I guess I do have a leak between the cat output and the intermediate - it's not too crazy, but the guy at Midas said he'd straighten it out for me.
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Old 12-18-2002, 04:07 PM   #9
Albert
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This header should finish the job nicely....$255.51 delivered

http://www.performancecenter.com/pro...PREZA&sf4=2.5L
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Old 12-18-2002, 05:36 PM   #10
six6sicks
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Well I have that same hi-flo cat on my car. I got it directly from Random Tech. It is their "new and improved" cat. I got a CEL before and after I put the cat on. I just changed spark plugs today and reset my light so I'm hoping it was a plugs cuz they were really dirty and not to mention Crappion(Champ.)
I'm running the Borla header in to the Rand.Tech. cat. with a Borla cat back. It'd been working well with my car. still have a flat part around 4k. I'm also waiting on a Cobb CAI, I ordered it over a month ago, can't wait to put it on with my new exhaust.
Oh, and I have a small exhaust leak between my header and cat. nothing to big, I just noticed some water driping from it, which might of been from something else. I also had to get a bigger dounut(mmmm...dounuts) I think that worked alright, had a problem with the stock bolts fiting, so I bought new ones for a temp. replacement. I went and bought new stock botls hoping that I just needed though extra two threads to get the stock bolts back on. We'll see.
But deffinatley get a header!

PEACE OUT!

Last edited by six6sicks; 12-18-2002 at 05:43 PM.
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Old 12-18-2002, 09:08 PM   #11
cvalle-sd
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Angry

Just got a CEL - grrrr

that link to the Borla header said "minimum welding required" - is that true, or do they really just bolt on? I don't remember anyone saying that they had to weld anything to install them.

And of course the big, rever-recuring question...will I really get more power? considering that I'll have a 2.25 section all the way back, are the Borlas going to change anything beside the sound? I'm still thinking about the new Cobb header, but if I can compromise between price and performance, I might just.
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Old 12-19-2002, 12:16 AM   #12
joefocker20
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Borla Headers for 237? MMM...
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Old 12-19-2002, 12:21 AM   #13
cvalle-sd
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How good a deal that is kinda depends on which generation they are, though. That seems like the best deal going, considering I could end up w/cat and header for about $350.




ah humm (mad face looks a lot like my pensive face...just not so red)
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Old 12-19-2002, 01:44 AM   #14
Albert
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Quote:
Originally posted by cvalle-sd
that link to the Borla header said "minimum welding required" - is that true, or do they really just bolt on? I don't remember anyone saying that they had to weld anything to install them.

And of course the big, rever-recuring question...will I really get more power? considering that I'll have a 2.25 section all the way back, are the Borlas going to change anything beside the sound? I'm still thinking about the new Cobb header, but if I can compromise between price and performance, I might just.
No reason for that "welding", they have that in the blurbs for other applications also

Spec says 7hp 10ft/lb gain.

If you have an intake, you should get some more giddyup especially since the rest of your exhaust is already opened-up. Most folks say the best part is the sweeeeet throbbing of the "boxer" engines. [Makes it sounds like a V-8 at idle?]
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Old 12-19-2002, 03:40 AM   #15
six6sicks
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Well I changed my plugs today and reset my computer. Went to Monroe (30-40mins drive) and came home still no CEL!
I think one of the plugs was bad. THe car seems to be running better also.

Borla's are the cheaper header, but they also do have a million mile warranty. I don't know about the others though, they might have the same dilly!

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Old 12-19-2002, 07:21 PM   #16
Kevin Thomas
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Quote:
Originally posted by Albert
This header should finish the job nicely....$255.51 delivered

http://www.performancecenter.com/pro...PREZA&sf4=2.5L


You sure that isn't for a Honda? Or were you joking with that link?
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Old 12-19-2002, 07:58 PM   #17
Albert
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The link is correct.

It's a generic picture as is that non-applicable welding statement.

**The part # is verified for the EJ25.

Ck out their site you'll see other Borla applications that use the same generic picture everywhere.
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