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Old 09-06-2005, 02:01 PM   #1
DLC
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Member#: 1964
Join Date: Jul 2000
Chapter/Region: RMIC
Location: 84XXX
Vehicle:
05 OB XT LTD
Silver/Gray

Default Random Cat Fittiment on BE/BH = Yes

I got tired of wondering whether or not to get a Cobb, TWE or custom set of headers built. Most people going to EL headers are pleased with the power, but not necessarily the sound. Those who do say they like the sound are probably justifying it in their minds...or were Honda drivers in their past automotive lives (i'm kidding here).

Martel Bros. had Random drop-ship me their High-Flow cat meant for the 2.5RS. There was no good reason it wouldn't fit, as the headers are the same, and the midpipe is simply longer, not shaped any differently. Other sites sell the cat for $499, Martel is a bit cheaper than that I also ordered it with the installation kit, which is another 25 bucks, but includes new bolts and gaskets.

It arrived, not looking like the box was wide enough to fit the cat. I found out that it was the perfect size when trying to extricate it from the box, which had to be cut and torn open to retrieve it. New cat section is Stainless, weighs about half of the stock cats, which were surprisingly light to begin with, and was a little smaller than I expected.

Install was done by a local shop. It is a former Cali car, so there's not much rust (yet), but I figured I'd leave it up to someone with the proper tools and a lift. The install took about an hour, with only one broken bolt, a new one at that. It was a perfect fit, no extensions on the O2 sensors needed or anything significant to note. For the record, I'm running Borla headers with a Fujitsubo Legalis midpipe and muffler.

Starting it up was...uneventful. I was actually very surprised at how quiet it was at startup and idle. I could tell a small difference, but it wasn't nearly as loud as I was expecting. I backed it out of the shop and around the building, gave it a quick blip, and smiled. Yeah, it did sound better.

Because of the muffler and resonator following it, the noise isn't anywhere as loud as my old wagon was with no cats post-turbo and a big Dynomax muffler. I liked that sound, a lot in fact, but I've been told it was simply LOUD, though not in a bad way. Now, at idle, acceleration, everywhere in the rev range, there's that distinctive Subaru Boxer sound that was a bit restrained before.

Power-wise, it's not exactly a revelation, but it did make a difference. Because I do have an improved intake, exhaust, cams and pulley, I have done most of the modifications that one is likely to do to a 2.5. If I'd done this when it was stock, I am certain it would have made a huge change in power. I will add that I have not reset the ECU either. The resulting change simply adds to the pile, if you will, of the already pleasing power I have from this excellent engine. I feel a bit more comfortable shifting into one higher gear when cruising, and highway acceleration in gear is also good. I'm calling it a good investment, as the original hat 103k on it. It's worth the sound, improved catalytic ability, weight and perhaps even, fuel economy. No CELs either!
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Old 09-06-2005, 09:58 PM   #2
Teh Legacy
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Location: Never miss an opportunity
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Random Cat may = yes, but....















Computer over
Virus = VERY YES!


Okay. I'm done now.
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Old 09-06-2005, 10:17 PM   #3
iamrazor
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2011 WRX LTD (FS)
1990 T30 miata

Default

Glad that worked out for you. Make sure you get us some sound clips too.
I hope it was alot cheaper than $499. That's $texas for a HF cat.

keep us up to date on the CEL situation too. I would buy one if i knew I'd get 0 CEL's from it.
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Old 09-07-2005, 01:42 PM   #4
DLC
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Silver/Gray

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Martel Bros. has them for $365 plus the install kit. A bit less than $500, yes.

Still no CEL. It seems that it depends on the car, whether you get a CEL or not. Mine's got plenty of miles on it, no stock exhaust parts, and still seems happy. I have not reset the ECU yet, but it's just running to well to mess with a good thing.
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Old 09-07-2005, 08:23 PM   #5
iamrazor
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1990 T30 miata

Default

DLC: hows the mileage with the HF cat? been through a few tanks of fuel yet?
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Old 09-08-2005, 03:14 PM   #6
DLC
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Silver/Gray

Default

I just got it installed last Friday, so it's not even been a week. I can get 375-400 miles per tank (15.5-16 gallons). It looks as though I'll hit that mark this time, because I have done a bit more driving than usual in the past week. If mileage stays the same, I'd be happy, especially for the improvement.

Before the cat, the car really like to rev all the way to redline in 2nd, then pull hard in 3rd. Now it's even better. The rush is noticeably more than before, so I have to force myself to lift/brake, but not to smile...that comes automatically

So far so good, no CELs, no funny sounds, nothing unusual.
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