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Old Sep 17, 2003 | 05:03 PM
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as most of you know im running a b16a (stock) setup, in a 91 civic dx, as far as exaust i dont want it to be loud, but i dont want to loose any performance, right now as it sits i am running header and lower manifold up till the cat conv, where it is chopped off, as far as a new converter im not wanting to hollow it out because it will sound like crap, where can i get a rather new cat. converter for this motor?

i didnt use the stock dx one because i have tried and tried to get some rusted bolts off but its impossible to do, so i have to go get another one
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Old Sep 17, 2003 | 08:53 PM
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On my B16 that is in my 90 hatch, I have a 4-1 DC header with a, I think it is Landspeed.com "race" cat, with 2 1/4 pipping all the way to a "stock" muffler pack.

I lost some power by adding the "stock" muffler welded in the back, but I'd rather be quiet and not attract attention of cops. When I go to the track, I just take my axel-back portion of my exauhst off, and run off of an open exauhst pipe.
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Old Sep 18, 2003 | 05:37 PM
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Originally posted by Cronic
Do you notice a performance difference when you do this?
Have you tried running with the exhaust both on, and off?

Just curious.

Back to the topic at hand. A hollow cat will not sound like shit. Any exhaust you get is going to be pretty loud. There's just no avoiding it really. go with 2.25 mandrel pipping, or 2.5 crushed pipe.

What size would be better for 00' Si 2.25 or the 2.5?
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Old Sep 20, 2003 | 01:10 PM
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Originally posted by Cronic
Do you notice a performance difference when you do this?
Have you tried running with the exhaust both on, and off?

Just curious.
Yeah, I notice a BIG difference. I get a tremendous ammount of power (over stock, with the muffler on). I only take off the axel-back portion... I am NOT running off of my header... I run off of the 2.25 pipping after the race cat. I have tried running off of just the headder once, and it did nothing but make my car EXTREMELY loud... no power gain whatsoever.
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Old Sep 20, 2003 | 03:09 PM
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Cats suck ass get a test pipe, i make them, let me know if you want one.
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Old Sep 20, 2003 | 04:19 PM
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yeah i have a hollow cat running to a type r axle back and its very quiet until i go w.o.t., then it just sounds kind of mean mixed with the intake growl
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Old Sep 20, 2003 | 07:48 PM
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i have a dc 4-1 header to 2.25" piping back to a stock muffler. i have no cat. you cant really hear anything till about 3k when the stock muffler gives a shitty rattling sound (i think i need to replace the muffler bearings ) then above that its not really that loud, just a mean growl from the cold air intake.

if youre going to get a new muffler i suggest an es oval muffler. i have seen a couple cars with these mufflers on them and they are a very nice muffler, ask anyone who owns one. i know neil (getrdun) on the boards has one and im sure he feels the same way i do about the muffler.
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