3rd gen Engine/Drivetrain Engine/Drivetrain Modification Discussions for 1999-2003 Models Only (BJ chassis)

Hi-Flo cats

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Old December-24th-2002 | 01:07 PM
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Hi-Flo cats

I notice that very few of the members here have hi-flo cats. My experiences in the past show that a hi-flo cat can do wonder on these types of cars...I'd guess about 3/4whp with the cat alone, coupled with a catback you'd probably gain up to 10whp...views on this???
Old December-24th-2002 | 04:06 PM
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well if it is tru that I will get something like 10whp...then NICE

cuz I'm looking at getting some type of exhaust....and a hi flow cat might be in my pros near future....

can anyone comment on this??
Old December-24th-2002 | 04:09 PM
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Sorry... Us Californians must break through a titanium safe to get to our cats. Oops... smog check! Gotta run!
Old December-24th-2002 | 10:42 PM
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i got a cat back thermal exhaust, and yes it does wonders...car redlines very easily now...lots of low end torque too....
Old December-24th-2002 | 10:48 PM
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nightowl, where did you get your thermal cat-back and how much did you pay? If you don't mind me asking.
Old December-25th-2002 | 12:40 AM
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Me and NightOwl already discuseed his thermal cat back exhaust

he told me it was very expensive...some thing $1200+ canadian
if my memory serves me correct...or was it moore than that
Old December-26th-2002 | 11:38 PM
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I've heard that with a bit of grinding and polishing the exhaust manifold is fine. The flex pipe is, I'm told the real problem in the exhaust system.
Old December-27th-2002 | 03:57 AM
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no kitty....

I removed one of my cats and my exhaust resonator and noticed a huge difference. There is though, not much you can do about the stock header design(2.0 Protege).
Old December-27th-2002 | 10:35 AM
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Originally posted by VagaBond-X
Me and NightOwl already discuseed his thermal cat back exhaust

he told me it was very expensive...some thing $1200+ canadian
if my memory serves me correct...or was it moore than that
Old December-27th-2002 | 12:31 PM
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Re: no kitty....

Originally posted by AFireInside
I removed one of my cats and my exhaust resonator and noticed a huge difference. There is though, not much you can do about the stock header design(2.0 Protege).
I'm thinking about getting this done, but I don't want it to be too loud, I mean obnoxiously loud. Did it end up this way? I might get a high flow resonater to help it quiet down. All this will be done when I get my CheckPoint cannon style muffler installed..
Old December-28th-2002 | 05:35 PM
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I found the Thermal cat-back at www.speedpeople.com for $579 US, would that be a good buy ? nightowl, how is the sound of the thermal ?
Old December-28th-2002 | 07:29 PM
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well you gotta see the video that nightowl made of his exhaust....it sounds sweet...IMO
Old December-29th-2002 | 12:06 AM
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x, is the video in the pic section ?
Old December-30th-2002 | 01:13 AM
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Originally posted by zoominD
x, is the video in the pic section ?
i took it off my web site...it was 2 megs compressed...if you want to here it icq me at 33424920 and i'll send it to ya
Old December-31st-2002 | 03:43 AM
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Originally posted by blue LEDz
the guy that did my exhaust said it'd be almost pointless to put on a high flow cat, unless i had a header. he said that was were the bottle neck was, and that the cat was rather high flowing to start with.
The guy who did my exhaust told me the same thing too.



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