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custom exhaust system.. cat or no cat

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Old 02-06-2005, 06:29 PM
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Default custom exhaust system.. cat or no cat

univeral muffler + 2.75 inch mandrel bends + hi-flow cat
or
univeral muffler + 2.75 inch mandrel bends - cat
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Old 02-06-2005, 06:57 PM
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Cat, if you want to be legal.
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Old 02-06-2005, 07:11 PM
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i live in new mexico so i dont need a cat cuz they dont have emissions laws here.. but it depends where you stay at
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Old 02-06-2005, 07:43 PM
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Which setup offfers more performance?
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Old 02-06-2005, 08:41 PM
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no cat gives you more performance

John
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Old 02-06-2005, 09:15 PM
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tats the dilema...


if i put on a hi-flow cat... woud i lost that much HP? i mean smog tickets arent cheap, espeically in CA

but there is also a silencer for the muffler so i can stay quiet and unnoticed to cops....


im really stuck on this...

hi-flow cat with lost of a little hp = legal


no cat with HP gains but use silencer to go unnoticed and hope not a smog ticket = illegal
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Old 02-06-2005, 10:29 PM
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your not going to miss the hp that you loose from the cat, you will however miss the money that you will pay if you get ticketed for not having one.

John
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Old 02-06-2005, 10:50 PM
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honestly, the silence won't silence it to the point like stock so you would still get noticed! I got pulled over once with a silencer on my muffler on!! for modified exhaust!!

keep the cat! the power gains are minimal and you will only get it up around 4000RPM while almost half of the torque at below 3000rpm will be gone!! not worth it unless you are dragging for quater miles all the time!!
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Old 02-06-2005, 10:51 PM
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Default Re: custom exhaust system.. cat or no cat

Originally Posted by hahaitzskippy
univeral muffler + 1.75 inch mandrel bends + hi-flow cat
or
univeral muffler + 1.75 inch mandrel bends - cat
oh yeah, 1 more thing!

our stock OEM pipes are already 1.75, i would suggest a 2"!! otherwise you won't notice much gains! either way!! TRUSTME talking from experience here!
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Old 02-06-2005, 11:12 PM
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Default Re: custom exhaust system.. cat or no cat

Originally Posted by cseika
Originally Posted by hahaitzskippy
univeral muffler + 1.75 inch mandrel bends + hi-flow cat
or
univeral muffler + 1.75 inch mandrel bends - cat
oh yeah, 1 more thing!

our stock OEM pipes are already 1.75, i would suggest a 2"!! otherwise you won't notice much gains! either way!! TRUSTME talking from experience here!
i heard 2.25 piping were giving the best numbers
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Old 02-07-2005, 06:22 AM
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typo edited and changed

and stock is 2.25 just to let you guys know
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Old 02-07-2005, 10:16 PM
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Originally Posted by jrv2000
your not going to miss the hp that you loose from the cat, you will however miss the money that you will pay if you get ticketed for not having one.

John
how much is an emissions/smog ticket anyway?
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Old 02-08-2005, 07:19 PM
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in CA

its at least 250
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Old 02-09-2005, 03:37 PM
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Tampering with catalytic converters falls under federal EPA regulations.

It's a $2,500 fine for the person who removed the cat and a second degree misdemeanor to knowingly drive a car with a tampered cat on public roads.
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Old 02-09-2005, 03:38 PM
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^^^ what he said... Stick to a high flow cat..
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Old 02-09-2005, 06:43 PM
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if you go that big wont you loose to much back pressure and drop alot of the low end tourq that makes our cars so fun to drive?
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Old 02-09-2005, 06:47 PM
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^^^^probably

John
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Old 02-09-2005, 07:36 PM
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Originally Posted by Daemon1313
Tampering with catalytic converters falls under federal EPA regulations.

It's a $2,500 fine for the person who removed the cat and a second degree misdemeanor to knowingly drive a car with a tampered cat on public roads.
what?!!! thats insane.
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Old 02-09-2005, 11:39 PM
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2.75 tubing is way to big for this engine. 2.5 is almost to big. If you are running a turbo it would be ok. I used to run a straight pipe on my Integra before and after I turboed it and it did make more horsepower in both occasions. You might be able to remove the heat shield from you cat and weld it to the new pipe making it appear you have a cat, or find a burn out old cat from a muffler shop and knock out all the catalyst inside of it Expect a even louder exhaust if you remove the cat though.
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Old 02-10-2005, 12:18 AM
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Originally Posted by bajamike
2.75 tubing is way to big for this engine. 2.5 is almost to big.
that doesn't make sense
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