Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

Hallow out cat versus performance straight throug cat.

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Old Dec 15, 2005 | 05:55 AM
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Tament's Avatar
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Default Hallow out cat versus performance straight throug cat.

I have a 97 accord LX 5 spd, is it woth the money to by a performance cat 'test pipe' or is it just the same hollowing out my cat. I currently have it hollowed out, (will be getting the O2 simulator soon to get rid og the check engine light). I know the LX is not going have that much power, but is it worth the cash?

Also i want to do a bit of upgrade to my car, i just dropped it, i bought the KYB AGX shocks, how would you guys ratethose over the KYB GR2?

What is the lasted year of the H22 egine made for my car, and how much will it cost.

Hey this is the time to go crazy with any eplanations you guys see fit. I love my Honda, I will keep her until i die or she dies.
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Old Dec 15, 2005 | 06:04 AM
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Default Re: Hallow out cat versus performance straight throug cat. (Tament)

I would have said to just leave the cat alone but since you've already hollowed it out... If you looking for performance, it is to my knowledge that a hollowed out cat only causes turbulance and disrupts airflow thus hurting performance. So since you've alread done this, I would say get a new cat. Not from the dealer since they are hella expensive. When I redid the exhuast on my hatch, I bought a cat from a shop in Arizona, that I've done business with before, cause they were the cheapest price shipped over night. It's been on the car for 1 1/2 yrs and is still doing good. I also looked at Random (sp?) but they wanted to much and shipping was a lot as well, needed it the next day.

Also, if you get a normal cat or even a "high flow" that has screens, you probably won't throw a code. I'm not sure on this, I'm just assuming. My Accord was OBD1 and my hatch is OBD1 as well so I don't have that extra o2 sensor to worry about.
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Old Dec 15, 2005 | 06:06 AM
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Default Re: Hallow out cat versus performance straight throug cat. (Tament)

since I like breathing I am gonna say do not remove your emissions stuff. and second, use the search feature as there are billions of threads on the H22 swap for this car. ALso using a simulator will cause your ecu to throw codes.....
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Old Dec 15, 2005 | 06:34 AM
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Default Re: Hallow out cat versus performance straight throug cat. (Tament)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tament &raquo;</TD></TR><TR><TD CLASS="quote">I have a 97 accord LX 5 spd, is it woth the money to by a performance cat 'test pipe' or is it just the same hollowing out my cat. I currently have it hollowed out, (will be getting the O2 simulator soon to get rid og the check engine light). I know the LX is not going have that much power, but is it worth the cash?

Also i want to do a bit of upgrade to my car, i just dropped it, i bought the KYB AGX shocks, how would you guys ratethose over the KYB GR2?

What is the lasted year of the H22 egine made for my car, and how much will it cost.

Hey this is the time to go crazy with any eplanations you guys see fit. I love my Honda, I will keep her until i die or she dies.</TD></TR></TABLE>

I really don't get the point of doing that. You could have gotten a test pipe for like...40 bucks...and then you'd still have your OEM cat for when you realized this gave you one extra whp and you could put that back on.

I hope you wore masks when you were hollowing out the cat, those things are full of carcinogens.

The difference between OEM and aftermarket cats is that the OEMs use more expensive materials (more quantities of the materials found within the aftermarket cats). Plus dealer markup, this makes them more expensive.

Aftermarkets generally fail before OEM cats because they use less materials to save money.

You really don't see that much performance gain from a test pipe unless your engine is turbocharged.
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Old Dec 15, 2005 | 08:28 AM
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Default Re: Hallow out cat versus performance straight throug cat. (Tament)

do you have emissions in fl? if not, just have teh ******* thing taken out, and some piping welded in, in its place.
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Old Dec 15, 2005 | 10:03 AM
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Default Re: Hallow out cat versus performance straight throug cat. (JakeIsCool)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JakeIsCool &raquo;</TD></TR><TR><TD CLASS="quote">do you have emissions in fl?</TD></TR></TABLE>

nope. we floridians can pollute allllllllll we want!! AHA! Take THAT ozone layer! nobody needs you...
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Old Dec 15, 2005 | 01:05 PM
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Default Re: Hallow out cat versus performance straight throug cat. (mac_24_seven)

i don't know the results of an f22, but with the h22's, the difference between running with and w/o cat is night and day...the upper rpm's is where you see the biggest noticeable gain...in no way am i condoning this however, but if you were to remove your cat, you will most likely see gains...anyone who has ever looked through the stock cat can attest to its tiny size and utter lack of flow...
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Old Dec 15, 2005 | 03:30 PM
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Default Re: Hallow out cat versus performance straight throug cat. (Nick H)

go to ebay and get the flow thru magnaflow carsound cat. i bought mine for around 59 bucks with free shipping. i was recommended from the guys here to get that one. i haven't gotten a chance to install it yet because i am waiting for my exhaust upgrade piping kit. as far as kyb. if your car is lowered you are better off with the agx's. the gr2 will go up to a 1.5 inches lowered car i believe. as far as year model h22. depends on what goals you have in mind. you can go 92-01 prelude. if you want to boost 92-96 would be your choice. everywhere you look you will probably get different prices so that is a hard one to narrow down. i got mine on ebay back in march of 04 for 1850 with the auto tranny though. 5 spd i seen at that time were like 2200. shop around for the best deals. stay away from the junk yards if you can. for one the are hard to find there,2 they might have a 50/50 chance of being in good condition. if you get one from the junk yard for less than 700 and you plan on rebuilding anyway, thats a deal. take it and run, drag or whatever you need to do to haul it off.
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Old Dec 15, 2005 | 05:21 PM
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I own a 95 accord with an f22 and i bought the car for $100 cause it was overheating and wouldnt rev past 5000 rpms, all it needed was a thermostat, and the cat was clogged shut so it wouldnt rev past 5k, so instead of spending money on a cat i just hollowed it out, it ran very well afterwords (go figure) the car seems to have decent power.

i also live in an area with out emissions regulations, i would not have taken it out unless i had do though.

Danny
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Old Dec 16, 2005 | 04:29 AM
  #10  
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Default Re: Hallow out cat versus performance straight throug cat. (accordselux)

Thanks for your help, i was in the process of buying the O2 simulator, so that is already bought, i am buying the performance cat as instructed as I type. The weirdest sh-t happened, my lights on my dash went out this morning. Last night when Came home and parked about 11:30 pm est, my dash lights where working, fine, i start my car this morning and no dash light......but the gad damn check engine is still on go fig.......Any takers on this.....I have not checked my fuses yet as i was on my way out the door. That will be my first stop when i get home in the PM.
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Old Dec 16, 2005 | 06:46 AM
  #11  
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Default Re: Hallow out cat versus performance straight throug cat. (Tament)

hollowing out your cat usually results in extra turbulence because your factory cat is smoothed out, even on the microscopic level, so air can flow easily. also, you should have left it as it is in case you want to resell the car and not let the next person have the burden of failing an emissions test.

what performance cat are you buying? is it a full catback exhaust?
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